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单词 pulley block
释义

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pulley block
pulley block n. [compare Middle Low German polleyenblok] a block or casing in which a pulley is mounted.
ΚΠ
1760 J. Ferguson Lect. 105 To the pulley-block V is hung the counterpoise W.
1862 Internat. Exhib.: Illustr. Catal. Industr. Dept. II. xxxi. 22/2 (caption) Wrought-Iron Pulley Block, with cast-brass or iron sheaves.
1913 H. Wilda Cranes & Hoists ii. 128 The lifting and lowering of the load is effected by means of multiple pulley blocks.
1990 A. Maidment I remember, I Remember (BNC) 106 The skeleton of the body..would be lifted on to rollers, rolled..down to the waiting chassis in the yard by means of skids. A pulley block was used to ensure the safety of this manoeuvre.
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更新时间:2024/9/21 1:52:16