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Description: Spedding Mill employed in collieries to generate light from sparks resulting from contact of flint on steel wheel revolving at high speed. Part: gearing, Aspect: ratio, Description: spur wheel teeth & pinion teeth & 5:1 step up (approx.) Material: metal, iron (wrought) image Source: Tyne & Wear Archives & Museums Identifier: emu.ecatalogue.science&industry.481581 Go to resource More Like this...
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