A textbook on mechanical and electrical engineering (1898)
International Correspondence Schools · Scranton : International Textbook Co., [1898-99] · leaf 263
Fig. 55. 74. One circle is said to betan|reiit to another circle whenthey touch each other at one pointonly, as in Fig. 56. This point iscalled the point of tangency,or the point of contact. … Fig. 5G.
Electrical engineering · Mechanical engineering
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