ZLB Polyurethane Buffer for Crane 1.It is for crane 2. should design as your need Introduction:ZLB Polyurethane Buffer for CraneZL series buffer is in JHQ series of buffer based on research and development of new products, and got the utility model patents (ZL02238026.1), this series with the unique buffers of steel wire connection structure, make more security, more durable, and can be and other ...