pulley-block

英 [ˈpʊli blɒk]

美 [ˈpʊli blɑːk]

n.  滑车组

医学

英英释义

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
  Synonym:pulleypulley blockblock

双语例句