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成品图纸>四层、双拼、100%E3%8E%A1%E4%BB%A5%E4%B8%8B、造价30-40%25E4%25B8%2587、开间20m%2525E4%2525BB%2525A5%2525E4%2525B8%25258A、进深20m%25252525252525252525E4%25252525252525252525BB%25252525252525252525A5%25252525252525252525E4%25252525252525252525B8%252525252525252525258A