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成品图纸>四层、双拼、200-300%E3%8E%A1、造价20-30%252525252525252525252525252525252525252525252525252525252525E4%252525252525252525252525252525252525252525252525252525252525B8%25252525252525252525252525252525252525252525252525252525252587、开间20m%25E4%25BB%25A5%25E4%25B8%258A