出典:Wikipedia
出典:『Wikipedia』 (2011/06/29 23:00 UTC 版)
Dross is a mass of solid impurities floating on a molten metal. It appears usually on the melting of low-melting-point metals or alloys such as tin, lead, zinc or aluminium, or by oxidation of the metal(s). It can also consist of impurities such as paint leftovers. It can easily be skimmed off the surface before pouring the metal into a mold or casting flask.
skuas
wrens
口うるさいさま
娘(さん).
汚すさま
ごみ
a hiccup
a plaything with which one trifles for pleasure
ぐぐれ
a wrinkle