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Standards and conventions for mechanical drawing (1921)
Kepler, Frank Roy, 1875-, Detroit (Mich.). Board of Education · [Detroit] · leaf 38
BRAS^ … COPRER . \.^- ■©.• <^.\o\ •c\. BRICK CONCRETE CONVELNTiONAL BREAKS RECTANGULAR BAR II ROUNO ROO zzzzzzm c v/m/<<>mA PIPE PIPE (lENGTH\A//^E) PLATE 20 37 DECIMAL EQUIVALENTS OF FRACTIONAL PARTS OF ONE INCH ( 015625 33 .5i56a5 64 , ,03125 <54,7 .53125 3^2 046875 35 32 .546875 64 , 0625…Mechanical drawing
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