单项选择题
A.a mark B.a bolt C.a dowel pin D.a measuring tool
The position of the interface between oil and water wit...
单项选择题The position of the interface between oil and water within the centrifuge is achieved by the use of （）.
A.gravity disc B.centrifugal bowl C.a stack of discs D.main sealing ring
The position of （） on the crosshead on a large diesel e...
单项选择题The position of （） on the crosshead on a large diesel engine is determined by dowel pins.
A.the guideway B.the piston rod C.the crosshead shoes D.the interlocked circlip
The ports are drilled in the liners at an angle of appr...
单项选择题The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.
A.the scavenging air B.the exhaust gases C.the mixed air D.the spray oil
