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ENGINEERING DRAWING - III, , GOVT.TOOL ROOM & TRAINING CENTRE, KARNATAKA, DIPLOMA IN TOOL & DIE MAKING / DIPLOMA INPRECISION, MANUFACTURING, , REFERENCE NOTES, , ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 1 of 62
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ENGINEERING DRAWING - III, , SUBJECT CODE: DTDM-IIIS 305, Contact Hrs. /Week: 4, , Contact Hrs. / Semester: 80, , 1. ASSEMBLY AND DETAIL DRAWINGS, -, , Review previously done assemblies., , -, , Concept of assembly drawings from the given part drawings., , -, , Indication and interpretation of surface roughness symbols as per IS 696:1972., , -, , Indication of fits and tolerances in assembly drawings., , 2., , Preparation of assembly drawings and parts list for the following:, , , Leaf Drill Jig, , , , Universal Coupling, , , , Tool Head of shaping Machine, , , , Lathe slide rest, , , , Tail Stock, , , , Machine Swivel Vice, , , , Machine Vice, , , , Swivel Bearing, , , , Knuckle Joint, , , , 2 Stage Progressive Tool, , , , Blanking Tool, , Note : No changes in this question paper, please be followed as per earlier procedure, , Reference books, , , Machine Drawing by KRG & N D Bhatt,, , , , Engineering drawing with problems & solutions by K R Hart,, , , , Engineering drawing for mechanical trades by K L Narayana, P Kannaiah, K Venkata Reddy., , , , Fundamentals of Engineering drawing by Warren J Luzadder, Jon M Duff, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 2 of 62
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ENGINEERING DRAWING - III, , ASSEMBLY DRAWING, It is representation of the product, consisting of several parts which are assembled, together to fulfill the necessary working of the product for which it is designed., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 3 of 62
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ENGINEERING DRAWING - III, , DETAIL DRAWING, It is the drafting of parts individually, which are de-assembled & every detail of the part, like size, shape, dimensions etc., are represented for ease of manufacturing in a, systematic way., A detailed part drawing is needed to define a part with dimensions, tolerances, materials,, finishes, etc. The drawing will be used to generate quotes for tooling and manufacturing., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 4 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 5 of 62
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ENGINEERING DRAWING - III, , How to Draw the sectional views and interpret them correctly?, , Need of sectioning., , Types of sectioning., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 6 of 62
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ENGINEERING DRAWING - III, , Sectioning plane Representation., , Partial Sectioning., , Showing internal profile details without sectioning Plane indication., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 7 of 62
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ENGINEERING DRAWING - III, , Drawing Sheet Sizes, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 8 of 62
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ENGINEERING DRAWING - III, , Lay-out in Drawing Sheet for a Progressive Press Tool., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 9 of 62
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ENGINEERING DRAWING - III, , Ballooning, , Ballooning is done to identify & correlate the part list to Assembly drawings., Ballooning is to be done in a systematic way., Sometimes the Quantity of the part is also mentioned in the balloon., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 10 of 62
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ENGINEERING DRAWING - III, , Part List., Observe the dimensions of each block, , Specify the parts in this order 1) Flats 2) Square 3) Rounds 4) Heat treated parts in the, same order 5) Standard Items, Part list serial No. to be in ascending order as the parts added in future for performance, improvable of the product can be added in the part list., The part list details to be in legible engineering script & the material & other, specifications to be as per IS standards., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 11 of 62
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ENGINEERING DRAWING - III, , Dimensioning., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 12 of 62
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ENGINEERING DRAWING - III, , Spacing & Readability., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 13 of 62
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ENGINEERING DRAWING - III, , Lettering, , Arrow Heads., Maintain the ratio of Arrow 1:3, , DO’S & DO NOT’S in Dimensioning, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 14 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 15 of 62
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ENGINEERING DRAWING - III, , Exercises for Dimensioning., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 16 of 62
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ENGINEERING DRAWING - III, , AUXILLARY VIEWS, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 17 of 62
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ENGINEERING DRAWING - III, , SHOWING DETAILS OF SHEET METAL COMPONENT BY AUXILLARY VIEWS, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 18 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 19 of 62
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ENGINEERING DRAWING - III, , REPRESENTATION OF SURFACE FINISH, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 20 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 21 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 22 of 62
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ENGINEERING DRAWING - III, , How to Represent Allen Screw & Dowel Pin, , Observe the chamfers at appropriate positions., Observe the driver (radius) & driven side of dowel pin., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 23 of 62
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ENGINEERING DRAWING - III, , How to Represent Allen Screw Clamping in Blind threaded hole., , Observe different depths of, Drilling, Tapping, and Screw, length., Observe Relief holes in 2 Plates, (B, C), , How to Represent Allen Screw Clamping in through threaded hole?, Observe Allen screw head inside plate B, Observe Allen screw thread inside plate A, Observe Relief hole in Plate B, Observe Thread length ending in Plate B Side, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 24 of 62
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ENGINEERING DRAWING - III, , How to draw Guide PILLAR & Guide BUSH in Assembly?, , Observe Center drill at both ends of Guide Pillar, Observe Fitting of Guide Bush (H7h6) using Allen Screw &, Guide Bush by press fit (H7g6), , How to draw floating Stripper Plate in Assembly, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 25 of 62
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ENGINEERING DRAWING - III, , Observe Spring Representation., Observe Allen Screw Representation., Observe Allen Screw raised up in tool closed condition., LEAF DRILL JIG, • Leaf jig has hinged jig plate., • Drill bushes are fitted on the jig plate which is hinged at one end., • The jig plate can be swung aside to provide clear path for work piece loading and, unloading., • Clamping screw and drill bushes are accommodated in jig pate., • The jig plate must have positive resting surface., • The jig plate is clamped against the resting face by an eyebolt., • Quick clamping and unclamping of the jig plate is possible., • Hand knob is provided to facilitate clamping, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 26 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 27 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 28 of 62
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ENGINEERING DRAWING - III, , UNIVERSAL COUPLING,, A universal, , joint (universal, , coupling, U-joint, Cardan joint, Spicer or Hardy, , Spicer joint, or Hooke's joint) is a joint or coupling connecting rigid rods whose axes are, inclined to each other, and is commonly used in shafts that transmit rotary motion. It, consists of a pair of hinges located close together, oriented at 90° to each other, connected, by a cross shaft. The universal joint is not a constant-velocity joint., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 29 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 30 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 31 of 62
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ENGINEERING DRAWING - III, , SHAPER TOOL HEAD, The tool head of a shaping machine comprises of the tool holding and the feeding, devices with add optional arrangements to set them inclined to the vertical It will be, mounted on the front end of the ram of the shaping machine., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 32 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 33 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 34 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 35 of 62
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ENGINEERING DRAWING - III, , LATHE SLIDE RES, Compound rest: Compound rest is a part which connects cross slide and compound, slide. It has a circular base on which angular graduations are marked. The compound rest, can be swiveled to the required angle while turning tapers. A top slide known as compound, slide is attached to the compound rest by dove tail joint. Tool post: This is located on top, of the compound slide. It is used to hold the tools rigidly. Tools are selected according to, the type of operation and mounted on the tool post and adjusted to a convenient working, position. There are different types of tool posts and they are: 1. Single screw tool post 2., Four bolt tool post 3. Four-way tool post 4. Open side tool post, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 36 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 37 of 62
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ENGINEERING DRAWING - III, , LATHE TAIL STOCK, Tailstock is located on the inner guide ways at the right side of the bed opposite to, the headstock. • The body of the tailstock is bored and houses the tailstock spindle or ram., • If the tailstock hand wheel is rotated in the clockwise direction, the spindle advances ., The uses of tailstock • It supports the other end of the long workpiece when it is, machined between centres. • It is useful in holding tools like drills, reamers and taps when, performing drilling, reaming and tapping. • The dead centre is off set by a small distance, from the axis of the lathe to turn tapers by set over method. • It is useful in setting the, cutting tool at correct height aligning the cutting edge with lathe axis., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 38 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 39 of 62
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ENGINEERING DRAWING - III, , MACHINE SWIVEL VICE, A machine vise — a mechanical device designed to hold work pieces still, during machining operations — can function as manual components or as a machining, device. Many typical manufacturing facilities use machining vises for applications that, have tight tolerances and require high precision. Although there are many merits associated, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 40 of 62
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ENGINEERING DRAWING - III, , with manual vises, machining vises are often more well-suited to holding a work piece, stationary during high-speed machining operations. Because high-speed machining can, cause extensive vibrations, machining vises are equipped to dampen vibrations and provide, excellent stability., The milling vise is more rugged than the quick vise, but is still economical and easy, to use. The detachable swivel base makes angle adjustments possible. The acme adjusting, screw is covered for protection. The milling vise counts on gib-like hold-downs to prevent, the movable jaw from lifting. Because there must be some play to allow the jaw to move,, there is no way to prevent a small amount of lift as the vise jaws are tightened., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 41 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 42 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 43 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 44 of 62
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ENGINEERING DRAWING - III, , MACHINE VICE, A Machine vise — a mechanical device designed to hold workpieces still during, machining operations — can function as manual components or as a machining device., Many typical manufacturing facilities use machining vises for applications that have tight, tolerances and require high precision. Although there are many merits associated with, manual vises, machining vises are often more well-suited to holding a work piece, stationary during high-speed machining operations. Because high-speed machining can, cause extensive vibrations, machining vises are equipped to dampen vibrations and provide, excellent stability., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 45 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 46 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 47 of 62
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ENGINEERING DRAWING - III, , SWIVEL BEARING, Swivel bearing is used to support and adjust itself the position of the shaft when, there is possibility of slight misalignment. Figure shows the details of a swivelling or selfaligning bearing. If consists of the fork 3 which is fitted into the body 1 by means of the, spindle 4, and by adjusting the spindle position, the fork may be elevated to any required, height. It is then free to swivel in a horizontal plane., The bearing 2, is then supported in the fork by means of two set screws 8. The, connection between the fork and the screws is such that, the bearing is free to swivel in a, vertical plane. The flexibility in both the planes is thus made available., Accurate alignment may be obtained by screw height and slide adjustments. After the, required adjustments are made to suit the shaft position, these are then locked., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 48 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 49 of 62
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ENGINEERING DRAWING - III, , KNUCKLE JOINT, A knuckle joint is a mechanical joint used to connect two rods which are under, a tensile load, when there is a requirement of small amount of flexibility, or angular, moment is necessary. There is always axial or linear line of action of load.[1], The knuckle joint assembly consists of the following major components:, 1. Single eye., 2. Double eye or fork, 3. Knuckle pin., At one end of the rod the a single eye is formed and a double eye is formed at the other end, of the rod. Both, single and double eye are connected by a pin inserted through the eye., The pin has a head at one end and at other end there is a taper pin or split pin. For gripping, purpose, the ends of the rod are of octagonal forms. Now, when the two eyes are pulled, apart, the pin holds them together. The solid rod portion of the joint in this case is much, stronger than the portion through which the pin passes., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 50 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 51 of 62
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ENGINEERING DRAWING - III, , BLANKING TOOL, Blanking – shearing a closed outline (desired part called blank) Blanking is a basic and, initial operation which is done in the press tool process. Here rear pillared press tool is, designed and the guide pin is diagonally located so operator easily feed the strip. And Shear, force required to blank the sheet is calculated to get the press tonnage. Press tonnage means, total capacity of the press machine to be selected for blanking considering all the criteria., Clearance is calculated and incorporated while designing of punch and die.in the blanking, tool is design like a compound tool so in this cause two blank parts produces in a single, shot., , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 52 of 62
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ENGINEERING DRAWING - III, , COMPONENT AND STRIP LAYOUT, , DIE LAYOUT, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 53 of 62
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ENGINEERING DRAWING - III, , FRONT ELEVATION, 13, , DOWELL, , STD, , 04, , 12, , ALLEN SCREW, , STD, , 08, , 11, , SHANK, , ST-42, , 01, , 10, , STOPPER, , ST-42, , 01, , 09, , GUIDE BUSH, , OHNS, , 02, , 08, , GUIDE PILLER, , OHNS, , 02, , 07, , BLANKING PUNCH, , HCHCr, , 02, , 06, , PUNCH BACK PLATE, , ONNS, , 01, , 05, , PUNCH HOLDER, , ST-42, , 01, , 04, , STRIPPER PLATE, , OHNS, , 01, , 03, , DIE PLATE, , HCHCr, , 01, , 02, , TOP PLATE, , ST-42, , 01, , 01, , BOTTOM PLATE, , ST-42, , 01, , MATERIAL, , NO OFF, , SL, No., , DRAWING, NO, , DESCRIPTION, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 54 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 55 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 56 of 62
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ENGINEERING DRAWING - III, , PROGRESSIVE TOOL A progressive tool differs from a stage tool in the following, respect: in a progressive tool the final component is obtained by progressing the sheet, metal or strip in more than one stage. At each stage the tool will progressively shape the, component towards its final shape, with the final stage normally being cutting-off., , COMPONENT AND STRIP LAYOUT, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 57 of 62
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ENGINEERING DRAWING - III, , DIE LAYOUT, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 58 of 62
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ENGINEERING DRAWING - III, , FRONT ELEVATION, 16, , DOWELL, , STD, , 04, , 15, , ALLEN SCREW, , STD, , 08, , 14, , SHANK, , ST-42, , 01, , 13, , STAGE STOPPER, , ST-42, , 02, , 12, , STOPPER, , ST-42, , 01, , 11, , GUIDE BUSH, , OHNS, , 02, , 10, , GUIDE PILLER, , OHNS, , 02, , 09, , PILOTING PUNCH, , OHNS, , 02, , 08, , PIERCING PUNCH, , HCHCr, , 02, , 07, , BLANKING PUNCH, , HCHCr, , 01, , 06, , PUNCH BACK PLATE, , ONNS, , 01, , 05, , PUNCH HOLDER, , ST-42, , 01, , 04, , STRIPPER PLATE, , OHNS, , 01, , 03, , DIE PLATE, , HCHCr, , 01, , 02, , TOP PLATE, , ST-42, , 01, , 01, , BOTTOM PLATE, , ST-42, , 01, , MATERIAL, , NO OFF, , SL, No., , DRAWING, NO, , DESCRIPTION, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 59 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 60 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 61 of 62
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ENGINEERING DRAWING - III, , GOVT. TOOL ROOM AND TRAINING CENTRE, , Page 62 of 62
