Twin wall concrete pump elbow 1,PM.Zoomlion,Schwing and so on 2, ... 50000 CBM 4:HRC:>=62 Concrete Pump elbowTwin wall concrete pump elbow researched by ourselves is applicable to many kinds ... hardness is 3mm. All the elbow body is processed by hot quenching treatment. Inner wall HRC can reach over 62 ... be used on PUTZMEISTER, SCHWING, etc, boom pumps. Sermac DN125*R275*90D double wall concrete pump elbow