The engine is reversed by axial displacement of the camshafts In order for this to be carried out, the cams are （） with inclined transition faces.

A、lathed

B、shaped

C、shrunk

D、developed

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第1题

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第2题

[单选题] Who is in charge of the main engine?（）

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第3题

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第4题

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第5题

[单选题] After the order “（）” is given, the air system is shut down, the turning gear put in.

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第6题

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