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  2. Tape dispenser - Wikipedia

    en.wikipedia.org/wiki/Tape_dispenser

    Prior to the development of the tape dispenser, 3M's standard clear scotch tape was sold as a roll, and had to be carefully peeled from the end and cut with scissors. To make the product more useful, the scotch tape sales manager at 3M, John Borden, designed the first tape dispenser in 1932, which had a built-in cutting mechanism and would hold the cut end of the tape until its next use.

  3. Metal roof - Wikipedia

    en.wikipedia.org/wiki/Metal_roof

    A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope . The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

  4. Crown post - Wikipedia

    en.wikipedia.org/wiki/Crown_post

    A crown post is a term in traditional timber framing for a post in roof framing which stands on a tie beam or collar beam and supports a collar plate. [1] Historically, crown posts were called king posts, but this usage is confusing and obsolete. A crown post is designed to be in a compression and transfers weight to the tie beam, where a king ...

  5. Digging bar - Wikipedia

    en.wikipedia.org/wiki/Digging_bar

    Chisel — a sharpened blade for cutting roots, digging and prying. A pinch point bar has a chisel at one end. Bars are typically 5 to 6 ft (1.5 to 1.8 m) long and weigh 15 to 23 lb (6.8 to 10.4 kg). They are usually made entirely of cylindrical or hexagonal forged steel with a diameter of approximately 1 in (2.5 cm).

  6. Richard Gurley Drew - Wikipedia

    en.wikipedia.org/wiki/Richard_Gurley_Drew

    Richard Gurley Drew (June 22, 1899 – December 14, 1980) was an American inventor who worked for Johnson and Johnson, Permacel Co., and 3M in St. Paul, Minnesota, where he invented masking tape and cellophane tape.

  7. Roof tiles - Wikipedia

    en.wikipedia.org/wiki/Roof_tiles

    The five elements of fire, water, wood, metal and earth were common decorations during the Three Kingdoms period, and during the Goryeo dynasty Celadon glaze was invented and used for the roof tiles of the upper class. Many post-war Korean roofs feature giwa and a common ornamental symbol is the Mugunghwa, South Korea's national flower. [29]

  8. Utility pole - Wikipedia

    en.wikipedia.org/wiki/Utility_pole

    Utility poles are usually made out of wood, aluminum alloy, [2] metal, concrete, or composites like fiberglass. A Stobie pole is a multi-purpose pole made of two steel joists held apart by a slab of concrete in the middle, generally found in South Australia.

  9. Tape measure - Wikipedia

    en.wikipedia.org/wiki/Tape_measure

    The tape has three scales: the normal metric, the internal scale and a diameter scale used for instance to measure sheet metal to be rolled into a cylinder of a certain diameter. It was produced by his own company T A Ljungberg AB until 2005, when it was bought by Hultafors in 2005, who retained the name "Talmeter" for the product they now ...

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