By controlling operation parameter after filter bed having been inoculated, the technology has removed iron and manganese successfully from groundwater with high concentration of iron and manganese.是什么意思_By controlling operation parameter after filter bed having been inoculated, the technology has removed iron and manganese successfully from groundwater with high concentration of iron and manganese.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句