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成品图纸>二层、造价30-40%252525252525252525252525252525252525252525252525252525E4%252525252525252525252525252525252525252525252525252525B8%25252525252525252525252525252525252525252525252525252587、开间20m%2525E4%2525BB%2525A5%2525E4%2525B8%25258A、进深20m%25E4%25BB%25A5%25E4%25B8%258A