English translation for "硬灰煤"

bone coal(black)
hard ash coal

Similar Words：

"硬环棱螺" English translation, "硬黄熟期" English translation, "硬黄熟期 坚糊熟期" English translation, "硬黄铜" English translation, "硬黄质结晶" English translation, "硬灰岩层" English translation, "硬辉沥青" English translation, "硬恢复" English translation, "硬回车" English translation, "硬回火" English translation