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Wanjia—Lub Chaw Tsim Khoom Siv Kho Mob Tsiaj Txij Li Xyoo 1985
Peb yog cov chaw tsim khoom ua lag luam hauv kev lag luam khoom siv kho tsiaj, tuav ntau dua 60 daim ntawv pov thawj patent, thiab peb cov khoom raug xa tawm...
khoom siv kho mob