A、the running-in period
B、the running process
C、gas exchange process
D、the boiler firing
更多“All the rings are slightly rounded on their external top and bottom edges to keep the oil film on the cylinder liner during （） for new piston rings.”相关的问题
A、wide compression rings are used B、oil rings are located above the piston C、chromium plating is used on all piston rings D、oil rings are located near the bottom of the piston skirt
A、Lack of elastic tension, when the rings are pressed into the groove by means of a stick B、Blackish appearance C、Fractured rings and missing rings D、all off the above
A、Excessively early injection timing B、Combustion knock C、Leaking piston rings D、Light load
A、A.increases the strength of the hook B、B.prevents the sling ring from coming out of the hook if the strain is abruptly eased C、C.prevents the sling ring from coming out of the hook if there is a strain on the sling ring D、D.All of the above
客服
TOP
查看正确答案
