单项选择题
A.a change-over chest B.a head tank C.a emergency bilge pump D.an air cooler
The control rod of a steering gear pump is attached at ...
单项选择题The control rod of a steering gear pump is attached at its outer end to （）.
A.the hunting gear B.the rudder stock C.the rudder controller D.the feedback unit
If a heavy sea strikes the rudder, the shock is transmi...
单项选择题If a heavy sea strikes the rudder, the shock is transmitted through （） to the rams, this cause a sudden increase in oil pressure in one of the cylinders.
A.the control rod B.the hunting gear C.the floating ring D.the tiller arm
Additional heat extraction from the exhaust gases can b...
单项选择题Additional heat extraction from the exhaust gases can be effected by adding an （） section to the unit in plants.
A.air cooler B.economizer C.injector D.air blower
