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Title: "Campbell and Banks" Piston Valve Ring with springs and pack [Go to resource]
Description: "Campbell and Banks" Piston Valve Ring with springs and packing (sectioned) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Creator: P. and A. Campbell Ltd. (maker) Identifier: 1934-461 Go to resource More Like this...
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