Zhengzhou LiHao vacuum equipment co.ltd, was founded in 1986(formerly the Zhengzhou general vacuum pump ) ,since the restructuring and reorganizing in 2009, committed to the vacuum equipment research and development, and production, have a first-class manufacturing equipment with a complete quality assurance system,which is the professional domestic vacuum and vacuum application equipment manufacturers, mainly production of biogas vacuum pumps, water ring vacuum pumps and compressors, rotary vane vacuum pump, roots pump, plunger pump, reciprocating vacuum pump, vacuum unit,16...