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ZLCONN ZL380A 38ton HDD horizontal directional drilling machine work onsite. to know more about 38ton HDD machine pls view: ZLCONN- 31 years in manufacturer HDD drilling equipments and drilling tools, from 15ton-140ton HORIZONTAL DIRECTIONAL DRILLS ZLCONN HDD Machine advantages: Only to mentioned several: 1) Big factory: We have 9 workshops of 60,000sqm. We are a big factor. Other companies workshop only 1000~10000sqm. 2) Self-produce and full procedure quality control. : Many other factories only have assembling workshops, other processes are outsourcing. My factory all by raw steel sheet dealing - steel sheet cutting - bending - making holes - application - welding- rust removal - electrophoresis surface treatment - heat treatment - assembling - testing, all by ourselves, much stable, better quality control. 3) Better raw Material, more stable more powerful, and durable: In China, only our Company uses L610 steel for the whole machi
