... Drilling dia.:75mm(46-325mm) coal mining drilling machine Certificate:CE/ ISO HGY-1500A Coal Mine Drilling Machine Company introduction: 1 ... , Sudan, Iran, Malaysia, Indonesia,South Korea, Costa Rica,Venezuela etc Features of HGY-1500A Coal Mine Drilling Machine :1) Wide ... performed by the hydraulic system. Applications of HGY-1500A Coal Mine Drilling Machine : 1.Construction drilling of the projects ...