ENDLESS-ROPE HAULAGE GEAR,

ENDLESS-ROPE HAULAGE GEAR, WITH TWO ROPE PULLEYS, READY TO BE FIXED UNDERGROUND. from the Article APPLICATIONS OF ELECTRICITY IN THE COLLIERIES OF GREAT BRITAIN. By Sydney F. Walker. from The Engineering Magazine Devoted to Industrial Progress Volume XIX 1900 The Engineering Magazine Co

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ENDLESS-ROPE HAULAGE GEAR, WITH TWO ROPE PULLEYS, READY TO BE FIXED UNDERGROUND. from the Article APPLICATIONS OF ELECTRICITY IN THE COLLIERIES OF GREAT BRITAIN. By Sydney F. Walker. from The Engineering Magazine Devoted to Industrial Progress Volume XIX 1900 The Engineering Magazine Co