This invention discloses a fan, which is composed of ventilation device and vibration generating device.

本发明公开了一种风扇，包括通风装置与震动发生装置。

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The communication device comprises an air vent, and the air vent is provided with the dustproof ventilation device.

所述通信设备包括通风口，在所述通风口处设有上述防尘通风装置。

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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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As it turned out, authorities' decision to rely on every tool at their disposal was a wise one: Dykes had planted an explosive device in a ventilation pipe he'd told negotiators to use to communicate with him on his property in the rural Alabama community of Midland City, and also placed another explosive device inside the bunker, the FBI said in a statement late Tuesday.

WSJ: Military tactics, arms, helped rescue Ala. hostage