包括电动贯通式开孔机、自带旁通筒式封堵机及特制四向三通、铁屑回收器等配套设备。开孔刀为套筒形，能将开孔刀切割下的料片随简刀一起从管道上提取出来。封堵时，又放回切割料片并复位固定，保持管道尺寸形状，利于管内作业。封堵机自带旁通，免去了另开旁通口和平衡口，全部开孔封堵作业过程只需开3个口，堵2个口，施工费用节省一半以上。 Including electric through-hole machine, comes with a bypass cartridge sealing machine and a special four-way links, scrap iron and other ancillary equipment. The hole cutter is sleeve-shaped, which can cut the material cut by the hole cutter together with the knife to extract it from the pipe. Closing, and put back cut pieces and reset fixed to maintain the size of the pipe shape, which will help pipe work. Blocking machine comes with bypass, eliminating the need to open another bypass port and the balance of mouth, all open-hole plugging operations just open 3 mouth, blocking 2 mouth, saving construction costs more than half.