... also include: twin layer elbow , casting elbow , ST52 long radius bend The twin layer elbow include : DN125*R275*90D, DN125*R275 ... , DN125*R275*45D, DN125 *R275* 30D etc The casting elbow type is variours, include Putzmeister NO.1 elbow , Putzmeister No.2 ... , DN125*R1000*45D, DN125*R500*90D, DN125*R500*45D . This type bend is used in stationary pump . CONCRETE PUMP CLAMP : Our clamp ...