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.
