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PREVIEW
... eatment plant that are commissioned are shown. According to the time announced on the video screen, such purification equipment can meet the needs of an ordinary city’s wastewater treatment industry. We do not know how many times this equipment can be reused.”
“But I know that soon this sewage treatment plant is going to be requested by national environmental protection agencies around the world, which is a real headache.”
“But why should Internet users pity and insult us?” ...
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