Dongguan Pure-Air Tech Co., Ltd. has rich expertise in the field of industrial fume & dust extraction and filtration. We are an environmental protection pioneer, so we developing latest filtration solutions for many industries, like laser processing, electronics PCB board production, ...

Dandong Bettersize Instruments Ltd. is a private high-tech enterprise specializing in the research, manufacture and service of particle size analyzers. We were established 1995, now staff more than 100 people, among whom engineers take up 50%. have 1 comprehensive office 4 departments, ...