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成品图纸>4层以上、300%252525252525252525E3%2525252525252525258E%252525252525252525A1%252525252525252525E4%252525252525252525BB%252525252525252525A5%252525252525252525E4%252525252525252525B8%2525252525252525258A、造价30-40%252525E4%252525B8%25252587、开间20m%2525E4%2525BB%2525A5%2525E4%2525B8%25258A、进深18-20m