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单词 locking bar
释义

> as lemmas

locking bar
locking bar n.
ΚΠ
1772 W. Bailey Advancem. Arts, Manuf., & Commerce I. iv. i. 166 The Locking-bar, which receives the shoulders of the jacks.
1889 G. Findlay Working & Managem. Eng. Railway 75 The ‘Locking Bar’..is chiefly applied to siding points to prevent their being moved while a train is passing over them.
2003 Daily Tel. 28 Aug. 23/7 My father was kept busy listening to and answering the bells of the block instruments and, with a marvellous wrist action, casually flicking over the heavy levers with his right hand, while his left fist pushed down the locking bar.
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