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
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A.higher efficiency of the gear train while reversing
B.the higher gear ratio
C.the multi-start feature
D.higher recovering speed
A.lower；igher
B.maximum；higher
C.predetermined minimum；higher
D.predetermined maximum；lower
A.becomes slack
B.can not be paid out unless the brake is overhauled or recover wire unless manually operated
C.will be let out because the brake is out of work
D.may be pay out due to no power
A.After
B.before
C.inside
D.outside
A.lower
B.higher
C.low
D.high
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