HDD Male and Female Connector Slider for XCMG/Drillto/DW/TXS/Goodeng Machine/Dilong/Vermeer/Zoomlion/Terra/Ditch Witch/Toro/Huayuan Trenchless Horizontal Directional Drilling Rigs Non-excavation horizontal directional drilling rig male and female pull head, protection short Male and female sliders, protection short connection, variable diameter