The ()pump is usually used as the lubricat
题型:单项选择题
问题:
The ()pump is usually used as the lubricating oil pump.
A.turbine
B.screw
C.vaneejector
D.centrifugal
The ()pump is usually used as the lubricating oil pump.
A.turbine
B.screw
C.vaneejector
D.centrifugal