... packing is a kind of new packing models. On the base of the casade ring, conjugate ring, suppermini ring intalox, ... it is a brand-new packing. The patent is recevied in 1998. The products features are the structure is special, high capacity, ... fertilizer, sulfuric acid, fine chemical, medicine, environmental protection etc. The utilization has a good result in Dalian petrochemical plant, Zhenhai ...