chain block

• n. 起重机

chain block的用法和样例：

例句

用作名词 (n.)

1. A shrill whistle rang out as a signal, a man over at the engine pulled a lever, a chain from the derrick was lowered, and the whistle rang out again.
   随着一声尖锐的哨响作为信号，机器后面的人拉动手柄，起重机下的铰链徐徐降下，然后又是一声哨响。