hand priming of pump

例句：

1. 1.The engineer hand-primed the pump before starting the machine.
   工程师在启动机器之前手动启动了泵。
2. 2. During maintenance, we manually primed the pump to ensure it was working properly.
   在维护期间，我们手动启动泵以确保其正常工作。
3. 3. The pump's manual priming feature is a safety measure that prevents accidents during startup.
   泵的手动启动功能是一种安全措施，可以在启动过程中防止事故的发生。