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成品图纸>4层以上、造价30-40%2525E4%2525B8%252587、开间20m%252525252525252525252525E4%252525252525252525252525BB%252525252525252525252525A5%252525252525252525252525E4%252525252525252525252525B8%2525252525252525252525258A、进深20m%2525252525252525E4%2525252525252525BB%2525252525252525A5%2525252525252525E4%2525252525252525B8%25252525252525258A