单项选择题
A.transmitter B.receiver C.pipes D.charging unit
The （） returns the pump operating rod to mid position a...
单项选择题The （） returns the pump operating rod to mid position as soon as the helmsman stops turning the wheel.
A.hunting gear B.cut-off level C.servo-motor D.swivel block
The （） in the steering gear system provides the force.A...
单项选择题The （） in the steering gear system provides the force.
A.control equipment B.power unit C.transmission mechanisms D.fittings and pipeline
The cable lifter, mooring drum and warp end of a split ...
单项选择题The cable lifter, mooring drum and warp end of a split windlass may be separately engaged or disengaged means of a （）
A.dog clutch B.Pair of gears C.worm gear D.turning gear
