Humphrey gas pump

例句：

1. 1. The Humphrey gas pump isa common tool in the workshop.
   汉弗莱气体泵是车间里常见的工具。
2. 2. The Humphrey gas pump was used to pumpthe oil into the engine.
   汉弗莱气体泵被用来将油泵入发动机。
3. 3. TheHumphrey gas pump was easy tooperate and reliable.
   汉弗莱气体泵易于操作且可靠。