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Title: 1 1/2 S [Go to resource]
Description: 1 1/2 S.E.A. Cup piston packings. Trist's patent 1912-1913 pressure tightened cup shaped piston packing. 3 1/2" dia. one of them cut in halves License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Creator: Ronald Trist and Co. (maker) Identifier: 1914-194 Go to resource More Like this...
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