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  2. Ryobi - Wikipedia

    en.wikipedia.org/wiki/Ryobi

    A Ryobi 4 color offset press Ryobi power drill. Ryobi Limited (English: / r aɪ ˈ oʊ b i / ry-OH-bee or / r i ˈ oʊ b i / ree-OH-bee; Japanese: リョービ株式会社, romanized: Ryōbi Kabushiki-gaisha, IPA: [ɾʲoːꜜbi]) is a Japanese manufacturer of components for automobiles, electronics, and telecommunications industries.

  3. NIOSH Power Tools Database - Wikipedia

    en.wikipedia.org/wiki/NIOSH_Power_Tools_Database

    This database advances this goal by informing buyers and users of power tools of the dangerous levels of noise and vibrations that they are exposed to while using the tools. By making people aware of how loud power tools actually are, NIOSH is attempting to encourage the design and production of quieter power tools and the proper use of hearing ...

  4. Industrial fan - Wikipedia

    en.wikipedia.org/wiki/Industrial_fan

    The axial fan is often contained within a short section of cylindrical ductwork, to which inlet and outlet ducting can be connected. Axial fan types have fan wheels with diameters that usually range from less than a foot (0.3 meters) to over 30 feet (9.1 m), although axial cooling tower fan wheels may exceed 82 feet (25 m) in diameter.

  5. Lawn mower - Wikipedia

    en.wikipedia.org/wiki/Lawn_mower

    The lawn mower was invented in 1830 by Edwin Beard Budding of Stroud, Gloucestershire, England. [1] Budding's mower was designed primarily to cut the grass on sports grounds and extensive gardens, as a superior alternative to the scythe, and was granted a British patent on August 31, 1830.

  6. Physics of whistles - Wikipedia

    en.wikipedia.org/wiki/Physics_of_whistles

    Each vortex creates a circular (ring) flow field whose axis varies slightly from the vertical as it passes. The figure suggests that the main component of the force on the physical ring is in the direction of the jet flow. If the vortex is a true ring (all parts are in phase), a dipole sound field directed along the jet axis is created.

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