This standard specifies the manufacturing technical requirements for the metal structure of marine jib cranes. This standard applies to cranes specified in GB/T 12932, and other types of cranes can also be implemented with reference.
CB/T 3491-1992 history
2011CB/T 3491-2011 Technical requirements of the metal structure-manufacturing for shipboard cranes
1992CB/T 3491-1992 Technical requirements for the manufacture of metal structures of marine jib cranes