Standards and conventions for mechanical drawing (1921)
Kepler, Frank Roy, 1875-, Detroit (Mich.). Board of Education · [Detroit] · leaf 26
SECT/ON O/V A-A F/G. t r-TT I I I … FIG. a PLATE 11 25 NOTES 57. Do not be afraid to use explanatory notes. Clearnessis all important. 58. All left-liand tlireads should be plainly marked. 59. Handed pieces should be marked Right (or Left) asshown. 60. On tool details it is customary to add a note belowregarding- material, as Tool…
Mechanical drawing
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