Mechanical Hammer Co: Difference between revisions
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* 1913 Advert for mechanical hammers <ref> Mechanical World Year Book 1913. Published by Emmott and Co of Manchester. Advert p394 </ref> | * 1913 Advert for mechanical hammers <ref> Mechanical World Year Book 1913. Published by Emmott and Co of Manchester. Advert p394 </ref> | ||
* Made 'Parallel Hammers' invented by W. Blacker <ref>Mechanical Technology by G F Charnock, 2nd Edition, 1934, Constable & Co </ref> | |||