“ballast pump”造句，怎麼用ballast pump造句

Function test and automatic controller test for ballast pump.

They are F. O. pumps， L. O. pumps, ballast pumps, fresh water pumps, sea water pumps, and bilge pumps.

rotary gas ballast pump

cargo and ballast pump speed control system

ballast pump control system

In this paper, method of calculation for pumping of water vapour with gas ballast pump is introduced.

ballast pump status-indicating system