The wetted carved mold is put on white paper and smoked with a candle.
把剪好的模版用水蘸湿贴在白纸上,再用蜡烛的烟熏黑。
The paper introduces the ammonia process of producing high-grade zinc oxide from impurities zinc oxide dust which produced by the smoked stoves in a large internal smelter.
本文介绍了利用氨法处理杂质成分复杂的某大型冶炼厂炼铅系统烟化炉氧化锌烟灰制备高等级氧化锌的工艺。
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