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
Joshua Rose
Страница - 67
Страница - 69
CHAPTER VII.
EXAMPLES IN BOLTS, NUTS, AND POLYGONS.
Fig. 149.
Fig. 150.
