Sino-US joint venture Beijing Zehua Chemical Engineering Co., Ltd. (Zehua), which is affiliated with Tsinghua University, is an engineering services provider and an applied research company that meets the mass transfer needs of the petroleum refining, petrochemical, chemical and environmental industries. With its diverse array of tower packings, column internals and trays, Zehua also serves as one of the main suppliers of mass transfer equipment in China. The combination of vast database complied from 21-year experience, in-depth support, high performance products and just in time delivery...