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Title: Ross "Pop" safety valve [Go to resource]
Description: Ross "Pop" safety valve, sectioned, patented by R. Ross in 1902 and 1904. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: safety valve Source: Science Museum Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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