CAD装配图,带式运输机传动系统中的展开式二级圆柱齿轮减速器-CAD assembly drawings, belt conveyor drive system in the expansion of two cylindrical gear reducer

煤矿用皮带机保护控制装置的电气系统图，方便从事该行业的人员学习使用。-Coal mine belt conveyor protection control device electrical system diagram to facilitate the use of personnel in the industry to learn.