在单位体积材料中包含位错的长度，或者说在材料内部任意单位截面上位错线的根数。
The total dislocation length per unit volume of material, alternately, the number of dislocations that intersect a unit area of a random surface section.
在单位体积材料中包含位错的长度，或者说在材料内部任意单位截面上位错线的根数。
The total dislocation length per unit volume of material, alternately, the number of dislocations that intersect a unit area of a random surface section.
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