Trenchless Hole Opener Sand/Rock/Stone HDD Extrusion Reamer for XCMG/Drillto/Dw/Txs/Goodeng Machine/Dilong/Vermeer/Zoomlion/Terra/Ditch Witch/Toro/Huayuan Drilling Machine Trenchless Horizontal Directional Drilling Squeeze Expansion Reamer Trenchless reaming drill Cone piece assembly drill bit Soil reamer Runner type/extrusion expansion type hole reamer Alias: head reamer, reamer, drill bit Uses: Reaming Extrusion Reamer