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Ck45 St52 SAE 1045 AISI 1045 C45e E355 E410 E470 Hard Chrome Plated and Turned Concrete Delivery Cylinder for Concrete Pump, Find Details and Price about Concrete Delivery Cylinder Pump Concrete Delivery Cylinder from Ck45 St52 SAE 1045 AISI 1045 C45e E355 E410 E470 Hard Chrome Plated and Turned Concrete Delivery Cylinder for Concrete Pump - Changzhou Chengxin Metal Products Co., Ltd.