开关 kāiguān HSK6 switch Definitions Defs Origin Strokes Stroke Words Sentences Sents 总开关 zǒngkāiguān main switch 微动开关 wēidòngkāiguān microswitch 气动开关 qìdòngkāiguān pneumatic switch 点火开关 diǎnhuǒkāiguān ignition switch