... on SCHWING, PM,KYOKUTO,SANY,ZOOMLION, CIFA, SINOTRUK, FOTON,etc and have been recoginezed by them. Concrete Pump PipeTechnology : It is ... quenched and carried out carburizing chemical treatment on the inner wall. It ... of it's inner wall can reach 60-65 degrees and the serving life of it can increase 3-5times.