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DRAFTING ROOM ROUTINE
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abbreviations aluminum amplifier artwork assembly drawing basic cable capacitor chassis checking circuit diagrams circuitry coaxial cable coil complete component board component symbols conductor connection diagram connection lines connector copper device diameter dimensions diode drafting draftsman drawing sheet drawn Dual-in-line packages electrical electronic equipment example function graph graph paper graphic symbols grid harness assembly holes horizontal identified inch indicated inductors input insulation integrated circuit interconnection laminate layer layout lettering located material mechanical metal military module mounted multilayer board ohms output panel pattern plastic points potentiometer printed circuit board printed wiring printed wiring boards rectifier reference designations relay resistor resistor symbol scale schematic diagram screws semiconductor shielding shown in Fig silicon-controlled rectifier sketch socket soldering space specifications standards subassemblies switch Table Teflon temperature terminal boards tion tolerance transistor tube tunnel diode unit various vertical voltage waveguide width wiring diagram