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关注:1
2013-05-23 12:21
求翻译:Many of the chemical additives used in coal dust suppression fluids are also very expensive. It is therefore another object of the invention to provide a coal dust suppression fluid which reduces the need for costly chemical additives. Furthermore, many of the chemicals used in coal dust suppression are themselves toxi是什么意思?![]() ![]() Many of the chemical additives used in coal dust suppression fluids are also very expensive. It is therefore another object of the invention to provide a coal dust suppression fluid which reduces the need for costly chemical additives. Furthermore, many of the chemicals used in coal dust suppression are themselves toxi
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