An introduction to the chemical treatment method of old water-supply wells--Exemplified by the remedial of old water-supply wells in Katmandu是什么意思_An introduction to the chemical treatment method of old water-supply wells--Exemplified by the remedial of old water-supply wells in Katmandu在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句