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
单项选择题 The spur geared mooring winches have advantages over worm geared ones in（）
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.
单项选择题 When the power is shut off, the wire（）
