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1 CECS 178 : 2019 ————————————————————————— 中國工程建設標準化協會標準 氣水沖洗濾池 整體澆筑濾板及可調式濾頭技術規程 (征求意見稿) Technical Specification for Integral Pouring Concrete Filter Floor and Adjustable Nozzle of Air-water Washing Filter 2 氣水沖洗濾池 整體澆 筑濾板及可調式濾頭技術規程 Technical Specification for Integral Pouring Concrete Filter Floor and Adjustable Nozzle of Air-water Washing Filter CECS 17