A、A.facilitate the installation of piston rings
B、B.allow for the expansion of the piston during operation
C、C.prevent crankcase vapors from entering the combustion chamber
D、D.reduce wearing of the upper cylinder liner
更多“The diameter of a piston is usually less at the crown than at the skirt, in order to （）.”相关的问题
A、thickness of the connected members B、diameter of the head C、entire length of the rivet D、diameter of the shank
A、thickness of the connected members B、diameter of the head C、entire length of the rivet D、diameter of the shank
A、A.change in impeller diameter B、B.square of the impeller diameter C、C.cube of the impeller diameter D、D.impeller efficiency for large changes in the size of the impeller
A、three times the circumference of a manila line B、five times the diameter of a manila line C、twice the diameter of its sheaves for manila line D、twenty times the diameter of a manila line
A、diameter of the discharge piping, with all other factors remaining the same B、diameter of the suction piping, with all other factors remaining the same C、width of the impeller only D、diameter of the impeller
A、diameter of the discharge piping, with all other factors remaining the same B、diameter of the suction piping, with all other factors remaining the same C、width of the impeller only D、diameter of the impeller
A、change in the impeller diameter B、square of the impeller radius C、cube of the impeller diameter D、impeller efficiency for large changes in its size
A、diameters of journals B、deflections of crankwebs C、diameters of crankpins D、none of the above
客服
TOP
查看正确答案
