| woailinda |
2008-03-04 13:16 |
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* Kreitzer, M. H.(1982). Internal focusing telephoto lens, ksli-Px Matsui, S.(1982). telephoto lens system, U.S. Patent 4338001. H<wkD9v}H5 Tanaka, T.(1986). Lens system, U.S. Patent 4575198.
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