... No.Announcement Date 11413942Hydraulic Drilling Rig Lubrication Oil Circuit Nozzle Construction ZL 2009 2 0121591.22010.5.1221410176Hydraulic ... quality, the standard drilling rig in China. It is No.1.Our drilling rig has hundreds of patents. 3), Training is Free ... best quotation.A, What is the working pressure ( Mpa, Bar, PSI)?B, What is the volume flow ( m3/min, CFM)?3, What is the Power supply ( KW ...