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  2. Prism sight - Wikipedia

    en.wikipedia.org/wiki/Prism_sight

    A prism sight or prismatic sight, sometimes also called prism scope or prismatic scope, is a type of telescopic sight which uses a reflective prism for its image-erecting system, instead of the series of relay lenses found in traditional telescopic sights. The use of prisms makes it possible to construct a shorter and lighter sight, or with an ...

  3. Fountain code - Wikipedia

    en.wikipedia.org/wiki/Fountain_code

    This code can be used with up to 8,192 source symbols in a source block, and a total of up to 65,536 encoded symbols generated for a source block. This code has an average relative reception overhead of 0.2% when applied to source blocks with 1,000 source symbols, and has a relative reception overhead of less than 2% with probability 99.9999%.

  4. PromotionCode.org - Wikipedia

    en.wikipedia.org/wiki/PromotionCode.org

    PromotionCode.org is a free resource for online shoppers and maintains affiliate partnerships with major retailers such as Target, Wal-Mart, HP and Verizon. The site both originates and disseminates print coupons and online promotion codes. PromotionCode.org maintains a community of shoppers that exchange user-submitted codes and a codes-by ...

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    en.wikipedia.org/wiki/Contact-lenses-4-us-coupons

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  6. GS1 DataBar Coupon - Wikipedia

    en.wikipedia.org/wiki/GS1_DataBar_Coupon

    GS1 DataBar barcode symbol encoding a GTIN-12 number. GS1 DataBar Stacked Omni-Directional barcode symbol encoding 00123456789012. The GS1 Databar Coupon code has been in use in retail industry since the mid-1980s. At first, it was a UPC with system ID 5. Since UPCs cannot hold more than 12 digits, it required another barcode to hold additional ...

  7. Ophthalmic trial frame - Wikipedia

    en.wikipedia.org/wiki/Ophthalmic_trial_frame

    ophthalmic trial frame is used to hold lenses and other accessories during correction of refractive errors. Test of. Visual acuity. A trial frame is a tool used by ophthalmic professionals like ophthalmologists and optometrists. It is basically an adjustable spectacle frame with multiple cells, used to hold corrective lenses, and other ...

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