1.Brief Introductions of QZ-1A core sampling rig QZ-1A two-phase electric sampling drilling rig is a portable core sampling drilling rig produced by Shandong Master Machinery Group Co.,Ltd. It is suitable for all kinds of geological exploration, like industrial and civil buildings, bridges, railways, roads and so on. QZ-1A core sample drilling rig is only 80kg; height is less than 2 meters, and the drilling rig can been break down structure. Hence it is easy to move and operated.