Machine drawing; a text and problem book for technical students and draftsmen (1921)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 101
Fig. 169. Section of Box. 129. Pulleys.—The forms and proportions of pulleys are dependentupon their use. For belt drives pulleys of cast iron, wood or steel areused with flat belts made of leather, cotton, rubber and other flexiblematerials. … Fig. 170. A Rigid Post Box.
Machinery
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