... manufacture the environmental protection dryer cooling medium of R-134a,R-407a, R-404a,R-410a,etc.The advantages of the medium:u ... accumulated production and sales experience of compressed air treatment for a long-term year,integrating the advanced technology from ... Shenyang,Zhengzhou,Wuhan, Chengdu and Wu-xi which responsible for before & after-sales technology consultation,business negotiation as well ...