In light of the operating condition, design principle, stress condition and the characteristic of air flow, the cause of fracture and mechanism of primary fan was studied and analyzed in this paper.
从风机叶片的运行工况、设计结构和受力状况以及气流流动的特点等方面，研究和分析了叶片产生断裂的原因和机理。
So to construct the air defense network with six lines of air defense and the relative operating mechanism is a problem urgent to be solved in the airport policing construction at present.
因此，构建以六道防线为主要架构并配以相关运作机制的空防安全网络，是当前机场现代警务机制建设急需解决的问题。
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