复印机不工作了，因为纸张卡住了。

The photocopier isn't working because of a paper ___jam.

传送带上的堵塞打乱了工厂的运营。

A ___jam in the conveyor belt disrupted the factory's operations.

技术人员修好了堵塞打印机滚轮的故障。

The technician fixed the ___jam that was blocking the printer's rollers.