冲击压缩
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Compress After Impact 压缩强度来
·2,447,543篇论文数据，部分数据来源于NoteExpress
Civil Aviation Passenger Transport Industry have low profit margin and easily impact from market risks, which compress capital, labor and technic.
民航旅客运输业是一个资金、劳动和技术密集型行业，行业的利润率低，抵御风险能力弱。
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