Crane tube is the petrochemical industry in the process of fluid handling equipment. It uses a rotary joint with rigid pipe and elbows connected together in order to achieve the train car tanker and pipeline transportation trestle transfer between the liquid medium activity equipment to replace the old hose connection， with high securityCrane tube is the petrochemical industry in the process of fluid handling equipment. It uses a rotary joint with rigid pipe and elbows connected together in order to achieve the train car tanker and pipeline transportation trestle transfer between the liquid medium activity equipment to replace the old hose connection， with high security