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Apr 15, 2024Cov ntsiab lus hauv cov ntsiab lus ntawm cov txheej txheem hlau mus rau hauv ...Cov txheej txheem txheej txheem uas siv niaj hnub physics, chemistry, metallurgy, cua sov thiab lwm yam kev ua kom tiav cov kev xav tau ua tiav yog hu ua txheej txheem kev ua haujl -
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