1800mm No Dig High Speed Hydraulic Rock Pipe Jacking Machine/Micro Tunnel Boring Drilling Machinery (MTBM) for Pipeline Hangzhou Supu Business Machine Co., Ltd. Base Info Description Pre：2000mm Underground Pipelines Rock Tunnel Boring Pipe Jacking Drilling Machine for City Utility Tunnel Next：Npd1500 High Speed Balance No Dig Slurry Compound Pipe Jacking Tunnel Boring Machine Machine for Steel Pipe
