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硫酸工业发展史
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硫酸工业发展史
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硫酸工业发展史
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history of sulphuric acid industry
硫酸工业发展史
21世纪初,硫酸工业已有270多年的历史。早期的硫酸生产采用硝化法,此法按主体设备的演变又有铅室法和塔式法之分。19世纪后期,接触法获得工业应用,已成为生产硫酸的主要方法。
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fractional differential
fractional differential equation
fractional differential integral equation
fractional differential-integral equation
fractional differential operator
fractional differentiation
fractional digit
fractional dimension
fractional distillation
fractional divisor
fractional drag
fractional [electric] charge
fractional electric charge
fractional equation
fractional equipment
fractional equivalence
fractional exponent
fractional expression
fractional factorial design
fractional-factorial design
fractional flow equation
fractional Fourier transform
fractional frequency
fractional function
fractional gain error
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