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Title: Model in brass (scale 1:8) of Silvers patent 1864 slide valv [Go to resource]
Description: Model in brass (scale 1:8) of Silvers patent 1864 slide valve and variable expansion reversing gear for steam engines License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1869-80 Go to resource More Like this...
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