单项选择题
A.to provide electrical signal B.to provide feed-back C.to provide local manual control D.to provide right rudder angle
The advantage of the control equipment is（）A.that the t...
单项选择题The advantage of the control equipment is（）
A.that the transmitter is on the bridge B.that local manual control can be achieved C.that remote control can be achieved D.simple in construction and reliable in operation
The spur geared mooring winches have advantages over wo...
单项选择题The spur geared mooring winches have advantages over worm geared ones in（）
A.higher efficiency of the gear train while reversing B.the higher gear ratio C.the multi-start feature D.higher recovering speed
In an automatic mooring winches, the wire is paid off t...
单项选择题In an automatic mooring winches, the wire is paid off the barrel at（） a tension and is recovered at（）tension.
A.lower；igher B.maximum；higher C.predetermined minimum；higher D.predetermined maximum；lower
