For the same reasons, the backwashing concerns the whole surface of the filter, without dead zones;therefore filtration is always carried out on the full surface of the filters.是什么意思_For the same reasons, the backwashing concerns the whole surface of the filter, without dead zones;therefore filtration is always carried out on the full surface of the filters.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句