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Title: Fosters patent 1896 steam reducing valve for 1 in [Go to resource]
Description: Fosters patent 1896 steam reducing valve for 1 in. diam. steam pipe in gunmetal, lower part in section License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1903-48 Go to resource More Like this...
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