●Designed for medium-coarse sand, weathered and strong weathered sand stone.
●Low speed and large toque drive mechanism, strong excavation force,3 times overload coefficient.
●Independent water injection and grouting system improves excavation soil condition applied to different ground.
●Low ground settlement, the minimal cover depth is only 1.5 times of the pipe OD.
●Central supported cutter,compact and lightweight, long service life, easy maintenance.
●Screw conveyor transfer soil in large quantity and conveyable grain size.
●2.5°steer angle,controlled by electrical system, easy operation, quickly response, digital displayed. 
●Full face cutting, 100% opening rate.