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88t Hydraulic Horizontal Directional Drilling Rig Crawler Heavy Duty HDD Trenchless Machine for Large Diameter Oil Gas Pipeline Crossing Construction, Find Details and Price about Horizontal Directional Drilling Machine Drilling Machine from 88t Hydraulic Horizontal Directional Drilling Rig Crawler Heavy Duty HDD Trenchless Machine for Large Diameter Oil Gas Pipeline Crossing Construction - Jiangsu Dilong Heavy Machinery Co., Ltd.