化学需氧量 huàxuéxūyǎngliàng chemical oxygen demand Definitions Defs Origin Strokes Stroke Words Sentences Sents 化学需氧量 化學需氧量 huàxuéxūyǎngliàng chemical oxygen demand (environmental science) chemical oxygen demand; COD
化学需氧量 化學需氧量 huàxuéxūyǎngliàng chemical oxygen demand (environmental science) chemical oxygen demand; COD