我发觉到热酸似乎把工作做得更好。
研究了从锌焙烧烟尘常压热酸浸出液中沉淀针铁矿的过程。
Precipitation process of the goethite from hot acid leaching solution of zinc concentrate roast dust was investigated.
本文采用热酸浸蚀试验,化学成份分析和金相分析等手段,对45钢轴所出现的发纹进行分析。
The hair lines of 45 steel driving axle when quenching and tempering was analysed by heat etching, chemical analysis and metallographic.
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