Drilling Rig, Drilling Rig Machine, Drill Rod manufacturer / supplier in China, offering Gy-150t Soil Drilling Machine for Geotechnical Studies Spt. Sample Extraction, Crawler-Mounted Portable Drilling Rig: Lightweight Design for All-Terrain Operations MD-300, Gyl-300 Crawler-Mounted Wireline Core Drilling Rig 300m Deep Coring for Mining Exploration & Geotechnical Investigations and so on.