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在作者推导的晶体位错链长统计分布理论公式的基础上，获得单位体积内总位错密度ρ中可动位错密度ρ＿ｍ的分量ｆ＿ｍ表达式ｆ＿ｍ＝ρ＿ｍ／ρ＝（１＋ｗ）ｅｘｐ（－ｗ）。进一步讨论了当ｌ＿ｃ和ｌλ变化时所造成的晶体单位体积滑移面积增量ｄｓ为：ｄｓ＝ρｂ（１－ｗ）ｅｘｐ（－ｗ）ｄｗ。最后对该式进行了初步探讨。
On the basis of the theoretical formula of dislocation chain length deduced by the author, the component f_m of the movable dislocation density ρ_m in the total dislocation density ρ within the unit volume is obtained, and the expression f_m = ρ_m / ρ = 1 + w exp - w). We further discuss that when the l_c and lλ changes caused by the crystal unit volume sliding area increment ds is: ds = ρb (1-w) exp (-w) dw. Finally, the formula was discussed.