MECHANICAL ORE UNLOADER. BY WALDON FAWCETT. _MECHANICAL ORE IINLOADER—IN THE COURSE OP CONSTRUCTION. MECHANICAL ORE UNLOADER—REMOVING ORE PROM A VESSEL., scientific american, 1900-01-06


MECHANICAL ORE UNLOADER. BY WALDON FAWCETT. _MECHANICAL ORE IINLOADER—IN THE COURSE OP CONSTRUCTION. MECHANICAL ORE UNLOADER—REMOVING ORE PROM A VESSEL., scientific american, 1900-01-06


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