What kind of conveying medium is delivered by centrifugal pump, sewage or clean water? (It is not clear in the bidding document)?
离心泵输送何种流体介质，污水还是清水？(在招标技术文件中不明确)？
What kind of conveying medium is delivered by centrifugal pump, sewage or clean water? (It is not clear in the bidding document)?
离心泵输送何种流体介质，污水还是清水？(在招标技术文件中不明确)？
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