Standards and conventions for mechanical drawing (1921)
Kepler, Frank Roy, 1875-, Detroit (Mich.). Board of Education · [Detroit] · leaf 32
rd screws, boltsand nuts. FINISH 74. The finish mark, /, made crossing the line indicatingthe surface finished, shows that the surface is to be finished asleft smooth by the tools. Plate 8, Fig. 4; Plate 9, Fig. 1. Asmall fraction placed a little above and to the right of the finishmark indicates… … 31 MACHINE 6CREW HEADS, HEXAGON SQUARE FH ACROSS FLATB WHEN O <^WHEN 0>^
Mechanical drawing
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