在8 2 B型计算机实验台设计制作出一套计算机时标实验系统，包括四相节拍电平及两相工作脉冲，利用此时标系统可组合出计算机所需要的各种时序信。
Design and make a set of computer time scale experiment system on 82B Lab desk, include four phase time eletronic level and two phase working pulse.
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.
泥质片岩是工作区内分布最多的岩石组合，出现了典型中压类型的标型矿物及矿物组合。
And the pelite schist is the main rock type, and contains the classic medium pressure metamorphic minerals.
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