if left untreated it lasts two weeks"
treated calcium carbonate
[化] 活性轻质碳酸钙
treated carbonates
[化] 活性碳酸钙
treated clay
[化] 活化白土
treated earth
treated felt
[化] 油毡
treated water
[化] 净化水
treated water conduit
[化] 清水导管