China HDPE Pressure Pipes Used in Coal Mine, Dn125mm, SDR11, Pn16, En11.4, ISO Standard ISO4427: 1996/GB/T13663-2000, Find details about China Hdpe Pipe, Polyethylene Pipe from HDPE Pressure Pipes Used in Coal Mine, Dn125mm, SDR11, Pn16, En11.4, ISO Standard ISO4427: 1996/GB/T13663-2000