单选题The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.Alimit switchesBemergency disconnect switchCgovernor brakeDposition of the counterweight on the brake handle
单选题
The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.
A
limit switches
B
emergency disconnect switch
C
governor brake
D
position of the counterweight on the brake handle
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