firing-pin group

例句：

1. 1.The engineers were working on the latest version of the firing-pin group.
   工程师们正在研究最新的点火针组版本。
2. 2.The new model car has a more sophisticated firing-pin group than its predecessor.
   新款汽车的点火针组比前一代更加先进。
3. 3.The technicians carefully inspected the firing-pin group to ensure it was functioning properly.
   技术人员仔细检查了点火针组以确保其正常工作。