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Tsev 12 Rau sab kawg 1/2

CHEMXIN yog ib qho ntawm cov chaw tsim khoom lag luam nto moo hom 'silica gel. nrog cov thev naus laus zis siab thiab cov kws tshaj lij, peb tuaj yeem paub koj ntawm nws cov qauv zoo thiab cov qauv. Txais tos kom yuav tus nqi qis silica gel hauv Tshuag nrog peb.

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