更新时间：2024-05-06 22:00:24
Noun:- a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
pulley block是什么意思 pulley block在线翻译 pulley block什么意思 pulley block的意思 pulley block的翻译 pulley block的解释 pulley block的发音 pulley block的同义词
