The development status of automatic on-line chemical oxygen demand(COD) analyzer are reviewed, including principle of the method, main kinds, main specifications and main instrument types.是什么意思_The development status of automatic on-line chemical oxygen demand(COD) analyzer are reviewed, including principle of the method, main kinds, main specifications and main instrument types.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句