German GEA screw compresses mechanic to make a principle, saw this article understand completely
The historical of screw compressor royal engineering college taught Sweden 1934 Lysholm(Li Siman) invent compressor of gas of type of the first double screw. Begin from 60 time, aircrew of fuel injection double screw applies at refrigeration unit. Swedish SRM company (double screw) invent screw of bilateral asymmetry molded lines above all, make screw machine efficiency rises greatly. 1960 French Zimmern(Xin Maien) (odd screw) the new structure that invents odd screw.