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About Patents
Great Britain. Department of Trade and Industry
Great Britain. Patent Office
其他書名
Patents as a Source of Technical Information
出版
Patent Office
, 1971
主題
Technology & Engineering / Inventions
ISBN
0856050067
9780856050060
URL
http://books.google.com.hk/books?id=Hzi0NQAACAAJ&hl=&source=gbs_api