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Title: Two treadles with footboards (arms marked A,B,C,DD for posit [Go to resource]
Description: Two treadles with footboards (arms marked A,B,C,DD for position of pitmans). License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1937-121/65 Go to resource More Like this...
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