本文介绍了一种煤矿掘进工作面用智能型组合开关，由主电路和控制电路组成。

This paper presents an intelligent Multi-Function Switch used in dig working face of coal mine, which be constituted by the main electric circuit and the control electric circuit.

youdao

本文介绍了一种煤矿掘进工作面用智能型组合开关，由主电路和控制电路组成。

This paper presents an intelligent Multi-Function Switch used in dig working face of coal mine, which be constituted by the main electric circuit and the control electric circuit.

youdao