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Title: 1 1/2 S [Go to resource]
Description: 1 1/2 S.E.A. Piston Rod packing rings, for 2 1/2" dia. rod, one of them cut in halves ( Trist's patent 1903-07) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Creator: Ronald Trist and Co. (maker) Identifier: 1914-193 Go to resource More Like this...
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