单项选择题
A.the main bearing B.the cylinder cover C.the entablature D.the sump
A-frames and cylinder block is held together by （） to f...
单项选择题A-frames and cylinder block is held together by （） to form a rigid structure.
A.connecting rods B.piston rods C.tie rods D.jack-bolts
Administrations should bear in mind the significance of...
单项选择题Administrations should bear in mind the significance of （） in maintaining safety of life and property at sea and in preventing marine pollution.
A.advanced nautical equipment B.advanced performance main engines C.emergency equipment D.communication and language skills
Adjust （） by means of lead wire.A.the clearance of the ...
单项选择题Adjust （） by means of lead wire.
A.the clearance of the main bearing B.the diameter of main bearing C.the gap of main beating D.the tolerance of main bearing
