With measures adopted to adjust entrance taper, open of air door, and alignment of the shaft coupling between blower and motor, the main exhaust blower can keep in steady operation.

通过调整入口锥、风门开度、主抽风机与电机之间的联轴器对中等措施，保证了主抽风机稳定运行。

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No special odor of coupling pieces, metal pieces without any side-effects, applicable to the door inside and outside.

无特殊气味，对联结件、金属件无任何副作用，适用于户内外。

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