The trend nowadays is to build the frame box as a separate fabricated construction and then, after stress relieving and machining the mating surfaces, to mount it on the （）.This has the advantage of saving weight.<br>A:seating<br>B:bedplate<br>C:entablature<br>D:cylinder block

The trend nowadays is to build the frame box as a separate fabricated construction and then, after stress relieving and machining the mating surfaces, to mount it on the （）.This has the advantage of saving weight.
A:seating
B:bedplate
C:entablature
D:cylinder block

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