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1. Kev nthuav dav kaw cov nqi hauv cov khw muag khoom lag luam ntawm hnub kawg ua lag luam, Butyl acetate tus nqi tseem ruaj khov nyob hauv qee thaj chaw. Cov dej ntws hauv qab tsis muaj zog, ua qee cov teeb meem kom txo qis lawv cov nqi. Txawm li cas los xij, vim cov nqi ntau lawm, Mos ...Nyeem ntxiv»
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Raws li ib qho ntawm cov khoom lag luam loj tshaj plaws hauv Shanm lub xeev, Suav, peb tau ua tiav cov khoom siv raw tshuaj thiab cov neeg tseem ceeb hauv kev lag luam rau ntau yam kev lag luam. Ntawm ...Nyeem ntxiv»