单项选择题
A.bedplate, connecting rods B.crankshaft, the connecting rods C.frames, crossheads D.crankshaft, the cylinder
The main function of the lubrication system in to enabl...
单项选择题The main function of the lubrication system in to enable （） of a film of oil between the moving parts.
A.the information B.the formation C.the scatter D.the friction
The main factor which determines the output of each cyl...
单项选择题The main factor which determines the output of each cylinder is （）
A.the cylinder weight B.the cylinder bore C.the cylinder length D.the cylinder cover
The main factor determining the output of each cylinder...
单项选择题The main factor determining the output of each cylinder is the cylinder （）.
A.density B.bore C.weight D.material
