A long steel cable, drawn at high speed and fed continually with wet sand, cuts through solid rock in a new type of quarry saw. Tiny grains of sand, dragged across the rock face, serve as abrasives to groove it at a rate hitherto unknown.
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Bibliographic details
Southland Times, Issue 20523, 27 June 1928, Page 8
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45Untitled Southland Times, Issue 20523, 27 June 1928, Page 8
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