出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/07/23 06:22 UTC 版)
Limescale is the hard, off-white, chalky deposit found in kettles, hot-water boilers and the inside of inadequately maintained hot-water central heating systems. It is also often found as a similar deposit on the inner surface of old pipes and other surfaces where "hard water" has evaporated.