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Peb tuaj yeem muab cov khoom siv ruaj ntseg, xws li vaj huam sib luag, PCB, solenoid, pob qhov rooj, lub thawv roj teeb, lub kaw lus kaw thiab lwm yam.Nws yog qhov zoo rau peb cov kev pab cuam tom qab muag thiab tseem muab rau cov khoom lag luam txawv teb chaws cov chaw tsim khoom hauv lwm lub tebchaws.