本安型声光信号装置在水采工作面的应用

Application of the Intrinsically-safe Audio-visual Signalling Device at Hydromining Coalface

介绍了本安型声光信号装置的结构组成、工作原理、使用情况及维护性能，指出了应用在水采工作面对安全生产的重要意义。

A brief introduction is made of the design,operating principle, use and maintenance of the signalling device, as well as the significance of using such a device at coal face for safety production.