单项选择题
A.a motor-driven steering wheel
B.a pneumatic steering wheel
C.a hand-driven steering wheel
D.an electric steering wheel
单项选择题 If a heavy sea strikes the rudder, the shock is transmitted through the tiller to （）.
单项选择题 Anchor capstans are used in some installation where the cable lifter rotates about a （）.
单项选择题 Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in （） position.