Proingas S.A.

Pfeiffer Vacuum is one of the world's leading developers, manufacturers and suppliers of vacuum solutions. With the invention of the turbopump, the company revolutionized vacuum technology in 1956 and has since then been synonymous with innovative va

Tianjin Jingqiang Chemical Co., Ltd. is a company specializing in the operation of chemical raw materials, mainly engaged in organic chemical products such as ethylamine, ethyleneamine series, methane chloride series, alcohol ether, alcohol amine, he