单项选择题 The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）

单项选择题 In automatic （） the winch may be overhauled and wire is paid off the barrel at a pre-determined maximum tension.

单项选择题 The （） is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.