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Title: Extractor head (1970) for sieving extractor (used to extract [Go to resource]
Description: Extractor head (1970) for sieving extractor (used to extract bitumen in solution from asphalt and simultaneously grade the aggragate to "BS 598"), 8 inch diameter with sealing gasket and screw on cap License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1993-482 Go to resource More Like this...
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