loose pulley

例句：

1. 1. The loose pulleyon the winch is causing problems withthe rope.
   绞车上的松绳滑轮导致绳索出现问题。
2. 2. The engineer had to adjustthe loose pulley to fix the problem.
   工程师不得不调整松绳滑轮来解决问题。
3. 3.The loose pulley was a major causeof the accident.
   松绳滑轮是这次事故的主要原因。