The O-Seal feature will effectively double block and bleed in most services, provided the line media is free of foreign matter and solids in suspension.是什么意思_The O-Seal feature will effectively double block and bleed in most services, provided the line media is free of foreign matter and solids in suspension.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句