closing switch

例句：

1. 1. The technician needs to ensure that the closing switch is properly secured before starting the machine.
   技术人员需要确保在启动机器之前，关闭开关被正确固定。
2. 2.The factory uses a special type of closing switch to prevent accidents during production.
   工厂使用一种特殊的关闭开关来防止生产过程中的事故。
3. 3.The engineer replaced the old closing switch with a more reliable model to improve safety standards.
   工程师用更可靠的模型替换了旧的关闭开关，以提高安全标准。