1. Circulation coring drilling 2. Single wall rod, air-lift RC drilling 3. Auger drilling 4. Diamond core ... all the drilling techniques of CMD100Circulation coring drilling Single wall rod, air-lift RC drilling Auger drillingDiamond core drilling DTH hammer ... connect related accessories of different drilling techniques, like fluid drilling, air drilling and foaming drilling, etc. 2 Specification: 1. ...