... device's production and the research and development, (20 year specialty) the enterprise research and development team explores ... TL371-320)phase control thyristor;(T212-10,T222-20,T232-20,T242-50,T151-100,T161-160.T271-320 ... *,TC233-500*,TL371-250 and so on)fast thyristor;(TB212,TB222,TB232,TB351,TB361,and so ... diodes;(DL212,DL222,DL173,DL153,and so on)fast recovery diodes;(DF212-10,DF212-16X,and so ...