※Our HistoryZhenjiang Greatwall Microtunnel Equipment ScienceTechnology Co., Ltd is a high- tech enterprise specializing in the design of underground pipe jacking equipment for more than 20 y

NPD series of slurry microtunnel boring machine are are capable of handling pipe size (I.D.) from 800mm to 4000mm for the condition of high underground water pressure and various of soil strata. Excavate through boulder, soft rock, medium hard rock,...

Machine quality and reliability is guaranteed by using the world famous hydraulic motor and other elements, reduction box, electrical parts and sensors.