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单词 gablock and chain
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gablock and chain
gablock and chain n. Obsolete a crowbar or lever with a chain attached, used for removing the props which support the roof of a mine shaft; cf. ringer-and-chain at ringer n.2 2.
ΚΠ
1891 Liverpool Mercury 25 Apr. 6/4 The jury recommended that in future, when the men were engaged drawing props, a gablock and chain should be used.
1907 Royal Comm. Mines: Minutes of Evid. I. 45/2 in Parl. Papers (Cd. 3549) XIV. 65 In repairing roadways, etc., I fail to see what can be done, except that perhaps the old timbers might be pulled out by ‘gab-lock and chain’, or other similar appliance.
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