... fixed end ,spiral hooping ,constraint circle The fixed end P type the anchor included by the extrusion anchorage ,anchor plate fixed end ... with high-pressure oil pump of ZB4/500 tpye,the anchoring the efficiency coefficient is more than 0.95.Established ... , grouting machine, machine, spare parts and professional maintenance.6) The acoustic tubes, rubber core wax, rubber water-stop, strand, corrugated ...