softwood charcoal造句

"softwood charcoal"是什么意思

造句与例句手机版

Proportions by weight are 75 % potassium nitrate ( known as saltpeter or saltpetre ), 15 % softwood charcoal, and 10 % sulfur.
It's difficult to see softwood charcoal in a sentence. 用softwood charcoal造句挺难的

相邻词汇

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