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THOSI HLO

DDT( Dichlorodiphenyltrichloroethane ) Thosi Hlo kan tih mai (Dichlorodiphen yltrichloroethane) hi kum 1874 khan an lo hmuchhuak tawh a, kum tam a liam hnu-ah Swiss mithiam Paul Hermann chuan kum 1939 a hlo hnathawh dan (insecticidal action) chu hman theihin … Continue reading

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