The hierarchy and definition of the precipitation-concentration degree and precipitation-concentration period of annual ......

New technologies for iodine separation and recovery are required to decrease environmental pollution and improve iodine ......

分析切割钢丝拉拔过程中压缩变形功、摩擦阻力功及在变径区由于速度突变而消耗的多余变形功，分别推导其相应的功率损耗数学公式，最后......

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