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设计不合理和考虑不周是零件失效的重要原因,()有可能成为零件破坏的起源。

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用鞋带将敌双臂,两拇指顺着并在一起,用鞋带在()上缠绕数圈打一死结即可。

什么叫过热器的汽温特性?对流,辐射,半辐射式过热器各具有怎样的汽温特性?

Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?()

A. Clogged air intake falters
B. Piston blow-by
C. A defective after-cooler
D. Faulty exhaust valve

什么是定量定律?

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