displacement piston造句

例句与造句

1. Generally, the 3 pumps used in excavators consist of 2 Variable displacement piston pumps and a Gear pump.
2. Two single stage, 1.5 MW positive displacement piston pumps, with variable speed drives, pressure pulsation dampeners and pressure relief devices are provided with one pump in operation and one standby.
3. It's difficult to find displacement piston in a sentence. 用displacement piston造句挺难的