The crankshafts on the large modern 2-stroke crosshead engines are （）big （）makes as a single unit and so are constructed by joining together individual forgings.

Because the tie bolts are so close to the crankshaft, s...

单项选择题Because the tie bolts are so close to the crankshaft, some engines employ （）to hold the crankshaft main bearing cap in position instead of conventional studs and nuts.

To prevent excessive （） in the transverse girders, the ...

单项选择题To prevent excessive （） in the transverse girders, the tie bolts are positioned as close to the center of the crankshaft as possible.

The A-frames carry the crosshead guides and support the...

单项选择题The A-frames carry the crosshead guides and support the engine （）.