It has to be tall because it is like a giant block and tackle
井架必须很高，因为它像一个巨型滑轮组。
block and tackle
英汉-汉英词典
n. 滑轮,滑车设备
词组 | 习惯用语
您要查找的是不是：
block and tackle system 滑轮组
block and tackle arrangement 起下用滑车系统
block and tackle tacke block 绳子或其他柔性材料与滑轮相组合的机件
block and tackle 滑车组；滑轮组
原声例句
New Concept English (4)
英语百科
Block and tackle
![](/Images/godic/202501/01/Block-and-tackle-in-use.svg5101.png")
![Various ways of rigging a tackle. All these are rove to disadvantage.[5]](/Images/godic/202501/01/Tackles5101.png")
![A gun tackle has a single pulley in both the fixed and moving blocks with 2 rope parts (n) supporting the load (FB) of 100N. The mechanical advantage is 2, requiring a force of only 50N to lift the load.](/Images/godic/202501/01/Polispasto2B5101.jpg")
![A double tackle has two pulleys in both the fixed and moving blocks with four rope parts (n) supporting the load (FB) of 100N. The mechanical advantage is 4, requiring a force of only 25N to lift the load.](/Images/godic/202501/01/Polispasto45101.jpg")
A block and tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift or pull heavy loads.
The pulleys are assembled together to form blocks and then blocks are paired so that one is fixed and one moves with the load. The rope is threaded, or rove, through the pulleys to provide mechanical advantage that amplifies that force applied to the rope.
近义、反义、联想词
近义词
n.hoist
英英词典
block and tackle n.
- pulley blocks with associated rope or cable
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