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单项选择题
A.Stray current
B.Rated current
C.Starting current
D.Earth current
单项选择题
A.pump
B.the cylinder
C.the hunting gear
D.the rudder
单项选择题
A.transmitter
B.receiver
C.pipes
D.charging unit
单项选择题
A.transmitter
B.receiver
C.pipes
D.charging unit
单项选择题
A.hunting gear
B.cut-off level
C.servo-motor
D.swivel block
单项选择题
A.control equipment
B.power unit
C.transmission mechanisms
D.fittings and pipeline
单项选择题
A.dog clutch
B.Pair of gears
C.worm gear
D.turning gear
单项选择题
A.cranes
B.mooring barrel
C.capstans
D.cable lifter
单项选择题
A.popular
B.common
C.in lead position
D.uncommon
单项选择题
A.spur geared
B.screw geared
C.worm geared
D.belt driven