thanhseryna
Thành Viên [LV 0]
Cac a chj gjao cho e it tai lieu ve he thong vrv dc k ah.cong ty e moj vao lam toan dung vrv ma e thi cu mu tit k bjet j ca.e chj hjeu so so thoi nen cug k lam dc j ca.mong cac a gjup do
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