If use the belt wheel, wheel, etc, shall set bracket support, in case of driving gear bearing by the radial force.
若用带轮、链轮等驱动时应设托架支承，以防主动齿轮轴承受径向力。
Ventilation device includes fan frame, blade and driving mechanism. The blade wheel and driving mechanism are all set in fan frame.
通风装置包括扇框、叶轮以及驱动机构，叶轮与驱动机构均容设于扇框内，且驱动机构与叶轮连结并驱动叶轮转动。
Ventilation device includes fan frame, blade and driving mechanism. The blade wheel and driving mechanism are all set in fan frame.
通风装置包括扇框、叶轮以及驱动机构，叶轮与驱动机构均容设于扇框内，且驱动机构与叶轮连结并驱动叶轮转动。
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