| 单词 | glass-soap |
| 释义 | > as lemmasglass-soap glass-soap n. Glass-making (a name given to) peroxide of manganese (see quot. 1832). ΚΠ 1832 G. R. Porter Treat. Manuf. Porcelain & Glass 148 Black oxide of manganese has long been used for clearing glass from any foul colour which it might accidentally possess through the impurity of the alkali employed..This property..occasioned it to be anciently known as glass soap. < as lemmas |
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