单项选择题
Aother name for the “swash plate” in the variable delivery pump is()
A.tiltable disc B.gravity disc C.distributing disc D.catch plate
单项选择题 The function of the cut-off lever is()
单项选择题 The advantage of the control equipment is()
单项选择题 The spur geared mooring winches have advantages over worm geared ones in()