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  2. Tractor Supply Company - Wikipedia

    en.wikipedia.org/wiki/Tractor_Supply_Company

    Tractor Supply Company (also known as TSCO or TSC), founded in 1938, is an American chain store that sells home improvement, agriculture, lawn and garden maintenance, livestock, equine and pet care equipment and supplies.

  3. Bank vault - Wikipedia

    en.wikipedia.org/wiki/Bank_vault

    To the right of the door's center are two linked boxes for the combination mechanisms and to the left is a four-movement time lock. This door has a four-point system for pressing the door into its opening (note the two stanchions left of the door opening) capable of exerting one third of the door's weight in closing force. Since this door ...

  4. Castle Grayskull - Wikipedia

    en.wikipedia.org/wiki/Castle_Grayskull

    The toy is designed to open for play and close for storage. A carrying handle is molded into the top of the castle. A large skull decorates the front, with a hinged "Jawbridge" allowing access to the interior, through the "mouth" opening. The interior has a throne room, elevator, and a trap door. [8]

  5. Truss - Wikipedia

    en.wikipedia.org/wiki/Truss

    Provided that the members are long and slender, the moments transmitted through the joints are negligible, and the junctions can be treated as "hinges" or "pin-joints". Under these simplifying assumptions, every member of the truss is then subjected to pure compression or pure tension forces – shear, bending moment, and other more-complex ...

  6. Lock (water navigation) - Wikipedia

    en.wikipedia.org/wiki/Lock_(water_navigation)

    A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.

  7. History of laptops - Wikipedia

    en.wikipedia.org/wiki/History_of_laptops

    R2E CCMC Portal laptop. The portable microcomputer "Portal", of the French company R2E Micral CCMC, officially appeared in September 1980 at the Sicob show in Paris.The Portal was a portable microcomputer designed and marketed by the studies and developments department of the French firm R2E Micral in 1980 at the request of the company CCMC specializing in payroll and accounting.