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成品图纸>三层、300%252525E3%2525258E%252525A1%252525E4%252525BB%252525A5%252525E4%252525B8%2525258A、造价30-40%2525252525252525252525252525E4%2525252525252525252525252525B8%252525252525252525252525252587、开间20m%2525E4%2525BB%2525A5%2525E4%2525B8%25258A、进深20m%E4%BB%A5%E4%B8%8A