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Instruments and Their Use
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American Standard angle auxiliary view avoirdupois axis beam compass bolts center line chamfer chart circle cone curve cutting plane cylinder detail drawings diagram diam diameter dimensions distance drawn Drill edge view ellipse engineer's scales engineering face fasteners Figure finished flange freehand front view gear give given graphic groove height hole horizontal illustrated inches intersection isometric joint layout length letters located machine material mensions metal method normal view Note object oblique oblique projection paper parallel pencil perpendicular pictorial picture plane piece pipe pitch position PROB Procter & Gamble production projection projection welding radius reference plane rivets scale screw screw threads seam welding shaft shape sheet shown in Fig shows side view sketch slot space specifications spur gear square steel tangent thickness thread tion tolerance top view triangle upset weld valve vertical weld symbol width wire