... auger or ground drill, garden auger, ice auger, earth drill, post hole drill and so on. Material: Steel 1.spiral drill rod 2.drilling ... discharge pressure, gas emission 3. water through or not spiral drill rod 1. Function: i. exploring gas and water hole drilling ... and disassemble ii. high drilling efficiency iii. stable drilling hole3. Drill Hole Dia.: φ32,φ35,φ42,φ45,φ50,φ65,φ75,φ89 ...