单项选择题
A.nap B.gap C.nip D.deflection
After "F.W.E" is given, the air system is shut down, th...
单项选择题After "F.W.E" is given, the air system is shut down, the （） gear put in, all drains and indicator cocks opened, and the cooling water kept running.
A.steering B.timing C.turning D.running
A-frames are mounted on the bed plate and support （） an...
单项选择题A-frames are mounted on the bed plate and support （） and cylinder block.
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
