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[求助]
求一段加氢方面的英译汉
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| The dry solid mixture was heated very slowly at 250℃ for about 3 h till the gas evolution due to decomposition of the nitrates is complete. The nitrate free samplewas ground to a fine powder and then calcined at 500℃ for 3 h to form mesoporous r-Al2O3.This sample was labeled as AU = (r-Al2O3 prepared using urea). |
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liubencai
木虫之王 (文坛精英)
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2楼2011-08-17 08:34:47
