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  2. Star shaft - Wikipedia

    en.wikipedia.org/wiki/Star_shaft

    In the north and south walls of the King's Chamber are two narrow shafts, commonly known as "air shafts". They face each other and are located approximately 0.91 m (3.0 ft) above the floor, 2.5 m (8.2 ft) from the eastern wall, with a width of 18 and 21 cm (7 and 8.5 in) and a height of 14 cm (5.5 in).

  3. List of John Deere tractors - Wikipedia

    en.wikipedia.org/wiki/List_of_John_Deere_tractors

    John Deere Model 60 (1955) John Deere Model 530 (1959) John Deere Model 430S (circa 1960) After years of testing, Deere & Company released its first proper diesel engined tractor in 1949, the Model R. The R was also the first John Deere tractor with a live independent power take-off (PTO) equipped with its own clutch. The R also incorporated ...

  4. List of components of oil drilling rigs - Wikipedia

    en.wikipedia.org/wiki/List_of_components_of_oil...

    Rotary table (#20) rotates, along with its constituent parts, the kelly and kelly bushing, the drill string and the attached tools and bit. Shale shaker (#2) separates drill cuttings from the drilling fluid before it is pumped back down the wellbore. Stand (#16) is a section of 2 or 3 joints of drill pipe connected and stood upright in the ...

  5. John Deere - Wikipedia

    en.wikipedia.org/wiki/John_Deere

    Deere & Company, doing business as John Deere (/ ˈ dʒ ɒ n ˈ d ɪər /), is an American corporation that manufactures agricultural machinery, heavy equipment, forestry machinery, diesel engines, drivetrains (axles, transmissions, gearboxes) used in heavy equipment and lawn care equipment.

  6. John Deere Model A - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Model_A

    The A was produced in a wide variety of versions for special-purpose cultivation. It received a styling upgrade in 1939 and electric starting in 1947. With the advent of John Deere's numerical model numbering system, the A became the John Deere 60, and later the 620 and 630, 3010, 3020, 4030, 4040, 4050, 4055, and ended with the 7610. [1]

  7. How did ancient Egyptians stack those heavy stones of the ...

    www.aol.com/news/engineers-theory-egypt-first...

    The shaft within the Step Pyramid is connected to a 200-meter-long (656-foot-long) underground tunnel that connects to another vertical shaft outside the pyramid. The external shaft might then ...

  8. Shaft and chamber tomb - Wikipedia

    en.wikipedia.org/wiki/Shaft_and_chamber_tomb

    The iconic Great Pyramid of Giza is one of the best-known examples of a shaft and chamber tomb Cross-section diagram of the ancient Egyptian shaft and chamber tomb inside the Great Pyramid of Giza. A shaft and chamber tomb is a type of chamber tomb used by some ancient peoples for burial of the dead. They consist of a shaft dug into the ...

  9. John Deere (inventor) - Wikipedia

    en.wikipedia.org/wiki/John_Deere_(inventor)

    John Deere was born on February 7, 1804, in Rutland, Vermont, [4] the third son of William Rinold Deere, [5] a merchant tailor, and Sarah Yeats. [6] After a brief educational period at Middlebury College, at age 17 in 1821, he began an apprenticeship with Captain Benjamin Lawrence, a successful Middlebury blacksmith, and entered the trade for himself in 1826.