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Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 309

An illustration from Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers, 1889, leaf 309
NG SELF-TAUGHT. pear put together are given in Figure 307a, while in307^ and 307^: the various parts are shown separately. The signification of the letters on some of thesedrawinors are as follows: O. S. D. or O. D. means outside diameter. P. D. means pitch diameter. P. means pitch. T. means teeth.… … Fig. 307. . rHE.HEADSTOCJCILL k CO. -21 mmmm

Mechanical drawing

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