总开关 zǒngkāiguān master switch Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 确保家里所有人都知道水的总开关在哪里。 quèbǎo jiālǐ suǒyǒurén dōu zhīdao shuǐ de zǒngkāiguān zài nǎli. Be sure that everyone in the home knows where the main water shut-off valve is located. Source: CCMatrix