Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 343
Fig. 4,290.—Jig for removing valve seats of the press fit type. It consists of a bolt with extralength of thread, a yoke and nut as shown. The operation is apparent from the cut. Fig. 4,291.—Detail of stuffing box for piston pump. difficulty hard to overcome, until the principle of keeping the…
Electrical engineering
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