This article introduces the design features, pneumatic design of explosion-proof contra-rotating axial fan, and the design, manufacture of fitted motor and the safety measures.

文章综述了煤矿用防爆对旋轴流风机的设计特点、气动设计、配套用电机设计以及加工制造和保证安全可靠的措施。

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The relationship is also put to the proof by Fan Ye, the writer of the History of the Late Han Dynasty.

这一关系，在《后汉书》的著者范晔那儿也能得到证实。

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Three kinds of leakage proof measures for coal dust fan are introduced.

介绍了煤粉风机的三种防泄漏措施。

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The proof is in the numbers: The top Facebook fan pages have 5 million to 10 million fans, while a game like "FarmVille" at its height had about 80 million monthly active users, Mehta says.

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