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Case ntawm Changchun Jiutai Longjia Wastewater Treatment Plant

Nyob rau hauv Changchun Jiutai Longjia Dej Dej Cog, cov cuab yeej xws li peb cov ntsuas qib ultrasonic yog siv los ntsuas cov kua theem ntawm lub tank tswj thiab hluav taws kub ntau lawm tank.