Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 390
Fig. 856. The lower nut, after … °mm. lO c^ o ^^ G/ Fig 857. Fig. 858. rubber ^ thick, the exterior ring of openings may be f by f, the la7ids or spaces between openings i wide, and exterior lap of the rubber ^ inch. With larger diameters and larger openings thicker rubber must be used. This valve. is often made of a long strip or…
Mechanical drawing
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