单项选择题
（） are used for cargo handling.
A.Cranes
B.Mooring winches
C.Windlasses
D.Foreman
点击查看答案&解析
相关考题
-
单项选择题
In a hydraulic system, （） are used to protect the system from over pressure.
A.stop valves
B.check valves
C.safety valves
D.reducing valves -
单项选择题
A hydraulic motor may be driven by （）.
A.an electric motor
B.a diesel engine
C.a compressor
D.oil -
单项选择题
A high rate of separation between oil and water is favored by （）.
A.large size of oil globule
B.low temperature
C.high viscosity
D.high flow rate
