Nyob rau hauv txoj kev ib txwm muaj, cov txheej txheem kho kom zoo nkauj ntawm cov khoom siv tes ua khoom siv feem ntau siv sijhawm txog 30 hnub.Los ntawm kev tsim, xaiv cov khoom siv, kev tsim kho, mus rau kev kho thiab xa tawm, txhua kauj ruam yuav tsum tau ua tib zoo npaj thiab ntau yam kev pab tib neeg.Ntau tus tswv ntawm kho kom zoo nkauj tuam txhab ...
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