Bedplates are the （） 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:hull<br>B:projection<br>C:graphitization<br>D:foundation

Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.
A:hull
B:projection
C:graphitization
D:foundation

出自：海船船员证

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