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Title: Model of Back plate expansion (1839) steam engine slide valv [Go to resource]
Description: Model of Back plate expansion (1839) steam engine slide valve for variable expansion, on fitting, arranged with 5 others for driving and adjusting by hand License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1903-125 Go to resource More Like this...
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