分式环
Study on Time-Sharing Difference Absorption Optical Fiber CH_4 Sensor Graded Ring of Fractions, Graded Fractional Module and Method of Graded Localization
分时差分式光纤甲烷气体检测仪的研制分式分次环、分式分次模与分次局部化方法
First, semi ring of fractions of a semi ring about a multiplicative closed subset in it is constructed.
先构造交换半环关于其乘法封闭子集的分式半环;
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