正确答案: A
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题目:() of the A-frames there is a strong cast iron frame called the scavenging air box.
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学习资料的答案和解析:
[单选题]利用液压拉伸器上紧贯穿螺栓时,如果拉伸器的油压仅达到上紧压力的50%时泄油孔就出现漏油现象,这种现象可能是()。
下密封环失效
[单选题]拆下来的增压器转子一般应该(),以防止()。
立放/变形
[单选题]In a diesel engine lube oil system, which of the following parts should be lubricated first?()
Main bearings