The supply shortage of LPG and diesel has offered a considerable space for the develop-ment of clean energies.“The domestic demand for LPG is expected to incr
According to the principles of simultaneous equilibrium and aqueous electronic charge neutrality, the complex equilibrium of zinc ammonia and zinc chloride in
【正】 Polyacrylamide(PAM)is the biggest varietyof water-soluble polymers.It is used exten-sively in oil recovery,ore dressing,paper making,textile,construction