jamming of a drilling tool

例句：

1. 1.The drilling tool jammed in thehole.
   钻头卡在了洞里。
2. 2.The traffic was so heavy that it causeda serious jamming of traffic.
   交通非常拥挤，导致严重的交通堵塞。
3. 3. The car's engine jammed and it wouldn't start.
   汽车的引擎卡住了，无法启动。