Txheej txheem cej luam: Sib piv cov alkali tsis kam, net ntxuav, tshem tawm roj thiab siv quav ciab tshem tawm kev ua tau zoo ntawm ntau yam surfactants feem ntau muaj nyob rau hauv kev ua lag luam niaj hnub no, suav nrog ob feem ntau siv pawg ntawm nonionic thiab anionic. Daim ntawv teev cov alkali tsis kam ntawm var...
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