A （）is the foundation of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.<br>A:Frame<br>B:Bedplate<br>C:Cylinder<br>D:Liner

A （）is the foundation of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.
A:Frame
B:Bedplate
C:Cylinder
D:Liner

出自：海船船员证

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