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  2. Newton K. Wesley - Wikipedia

    en.wikipedia.org/wiki/Newton_K._Wesley

    Newton K. (Uyesugi) Wesley (c. 1909 – July 21, 2011) [1] was an optometrist and an early pioneer of the contact lens.Wesley was a partner with George Jessen in the development and advancement of contact lens. [2]

  3. GHS hazard statements - Wikipedia

    en.wikipedia.org/wiki/GHS_hazard_statements

    Fatal in contact with skin or if inhaled H311: Toxic in contact with skin H311+H331: Toxic in contact with skin or if inhaled H312: Harmful in contact with skin H312+H332: Harmful in contact with skin or if inhaled H313: May be harmful in contact with skin H313+H333: May be harmful in contact with skin or if inhaled H314: Causes severe skin ...

  4. Roadie (app) - Wikipedia

    en.wikipedia.org/wiki/Roadie_(app)

    Roadie operates 1-hour grocery delivery for Walmart, and delivers perishable food items for others including small, independent retailers. [ 27 ] [ 28 ] The on-the-way model complements the grocery industry’s just in time model, making last-mile deliveries that do not break the cold chain .

  5. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  6. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  7. Achromatic lens - Wikipedia

    en.wikipedia.org/wiki/Achromatic_lens

    Uses an equiconvex crown glass lens (i.e. R 1 > 0 with −R 1 = R 2) and a complementary-curved second flint glass lens (with R 3 = R 2). The back of the flint glass lens is flat ( R 4 = ∞). A Littrow doublet can produce a ghost image between R 2 and R 3 because the lens surfaces of the two lenses have the same radii.

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