ballast pump造句

ballast pump control system

rotary gas ballast pump

ballast pump status-indicating system

cargo and ballast pump speed control system

Function test and automatic controller test for ballast pump.

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

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