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单词 gadding car
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gadding car
gadding car n. a machine designed to drill straight lines of holes in rock for the insertion of gads, consisting of one or more rock drills mounted on a wheeled platform; cf. gadder n.2; (also) the wheeled platform of a machine of this kind.
ΚΠ
1874 Jrnl. Soc. Arts 14 Aug. 822/1 Several machines on a suitable gadding car or frame.
1988 CIM Bull. (Canad. Inst. Mining & Metall.) May 64/2 The first of these units is a gadding car from 1956, which demonstrates the methods used by the miners of that time to drill holes.
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