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成品图纸>四层、300%25252525E3%252525258E%25252525A1%25252525E4%25252525BB%25252525A5%25252525E4%25252525B8%252525258A、造价40-60%252525252525252525252525252525252525E4%252525252525252525252525252525252525B8%25252525252525252525252525252525252587、开间20m%25E4%25BB%25A5%25E4%25B8%258A