purgation

noun [专属名词]清洗；洗罪；（吃泻药）通便

Outdoor advertising obsolescence, strain, wearout, feculent, will order date of expiration purgation, maintenance repairs or renewal. ^{户外广告陈旧、变形、破损、不洁的，将责令限期清洗、维修或更新。}