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成品图纸>三层、双拼、300%25E3%258E%25A1%25E4%25BB%25A5%25E4%25B8%258A、造价60-80%25252525252525252525252525252525252525252525E4%25252525252525252525252525252525252525252525B8%2525252525252525252525252525252525252525252587、开间20m%2525E4%2525BB%2525A5%2525E4%2525B8%25258A