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  2. Perforated metal - Wikipedia

    en.wikipedia.org/wiki/Perforated_metal

    The process of perforating metal sheets has been practiced for over 150 years. In the late 19th century, metal screens were used as an efficient means of separating coal. The first perforators were laborers who would manually punch individual holes into the metal sheet. This proved to be an inefficient and inconsistent method which led to the ...

  3. Vehicle registration plates of Idaho - Wikipedia

    en.wikipedia.org/wiki/Vehicle_registration...

    In 1956, the United States, Canada, and Mexico came to an agreement with the American Association of Motor Vehicle Administrators, the Automobile Manufacturers Association and the National Safety Council that standardized the size for license plates for vehicles (except those for motorcycles) at 6 inches (15 cm) in height by 12 inches (30 cm) in width, with standardized mounting holes. [1]

  4. Vehicle registration plates of Arizona - Wikipedia

    en.wikipedia.org/wiki/Vehicle_registration...

    Revalidated for 1943 and 1944 with windshield stickers, due to metal conservation for World War II. 1945–46 Embossed black serial on white plate; "ARIZ. 45" centered at top none: A1234 Coded by county of issuance (A) Revalidated for 1946 with windshield stickers. 1947 Embossed red serial on unpainted aluminum plate; "ARIZ. 47" centered at top

  5. Vehicle registration plates of California - Wikipedia

    en.wikipedia.org/wiki/Vehicle_registration...

    White plate with blue numbering consisting of letter E in diamond and 6-digit number for state-owned vehicles. "California" is in red block font. 1993 E123456 E000000-E999999 White plate with blue numbering consisting of letter E in diamond and 6-digit number for state-owned vehicles. "California" is in red script font. Exempt 1998 1234567

  6. Blanking and piercing - Wikipedia

    en.wikipedia.org/wiki/Blanking_and_piercing

    A typical compound fine blanking press includes a hardened die punch (male), the hardened blanking die (female), and a guide plate of similar shape/size to the blanking die. The guide plate is the first applied to the material, impinging the material with a sharp protrusion or stinger around the perimeter of the die opening. Next, a counter ...

  7. Vehicle registration plates of Wisconsin - Wikipedia

    en.wikipedia.org/wiki/Vehicle_registration...

    Embossed green serial on white plate; "WIS", year sticker and "APR" at bottom. 12345 1 to 99999 All motorcycle plates expire on April 30 in even-numbered years. [16] A1234 A101 to Z9999 AB123 AA101 to KU999 April 2003 [17] – 2024 Embossed black serial on white plate; "WISCONSIN" at top; "APR" and year sticker at bottom AB 123 KV 101 to ZZ 999