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成品图纸>四层、美式、造价30-40%252525252525252525252525252525252525252525252525252525252525252525252525252525252525E4%252525252525252525252525252525252525252525252525252525252525252525252525252525252525B8%25252525252525252525252525252525252525252525252525252525252525252525252525252525252587、开间20m%E4%BB%A5%E4%B8%8A