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  2. Fire pit - Wikipedia

    en.wikipedia.org/wiki/Fire_pit

    A fire pit. The defining feature of fire pits is that they are designed to contain fire and prevent it from spreading. A fire pit can vary from a pit dug in the ground (fire hole) to an elaborate gas burning structure of stone, brick, and metal. Certain contemporary fire pit styles include fire bowls that can either be set in the ground or ...

  3. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    (A Reuleaux triangle or other curve of constant width would also serve this purpose, but round covers are much easier to manufacture.) Round tubes are the strongest and most material-efficient shape against the compression of the earth around them. A round manhole cover of a given diameter has a smaller surface area than a square cover of the ...

  4. Fire iron - Wikipedia

    en.wikipedia.org/wiki/Fire_iron

    A fireplace poker (also known as a fire iron) is a short, rigid rod made of fireproof material used to adjust coal and wood fuel burning in a fireplace, and can be used to stir up a fire. A fireplace poker is usually metal and has a point at one end for pushing burning materials (or a hook for pulling/raking, or a combination) and a handle at ...

  5. Pit prop - Wikipedia

    en.wikipedia.org/wiki/Pit_prop

    A pit prop or mine prop (British and American usage, respectively) is a length of lumber used to prop up the roofs of tunnels in coal mines. Canada traditionally supplied pit props to the British market. As coal mining declined in importance and metal supports were used, the term became infrequently used.

  6. Bitumen - Wikipedia

    en.wikipedia.org/wiki/Bitumen

    By the 3rd millennium BC refined rock asphalt was in use in the region, and was used to waterproof the Great Bath in Mohenjo-daro. [ 33 ] In the ancient Near East , the Sumerians used natural bitumen deposits for mortar between bricks and stones, to cement parts of carvings, such as eyes, into place, for ship caulking , and for waterproofing. [ 3 ]

  7. Speed Racer - Wikipedia

    en.wikipedia.org/wiki/Speed_Racer

    This turned out to be the first in a series of five DVD re-releases of the show. The second volume, containing episodes 12 through 23, went on sale on May 18, 2004. The DVD came in a special package where one could push a button on the cover and the Mach 5's headlights would light up, while a portion of the show's English theme song played.

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