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