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  2. Caisson (engineering) - Wikipedia

    en.wikipedia.org/wiki/Caisson_(engineering)

    Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.

  3. Waterproof paper - Wikipedia

    en.wikipedia.org/wiki/Waterproof_paper

    Waterproof paper uses special coatings (plastic-coated paper) and fibers to enhance durability, dimensional stability, tear resistance and resistance to changing shape or texture when exposed to water. The paper has applications for wet or damp environments, including outdoor, marine, field uses as well as printing applications for similar ...

  4. Stuffing box - Wikipedia

    en.wikipedia.org/wiki/Stuffing_box

    Boats. A small boat stuffing box comprising an adjusting nut, a locking nut and a sleeve. On a boat having an inboard motor that turns a shaft attached to an external propeller, the shaft passes through a stuffing box, also called a "packing box" or "stern gland" in this application. The stuffing box prevents water from entering the boat's hull.

  5. Papyrus - Wikipedia

    en.wikipedia.org/wiki/Papyrus

    Papyrus (/ pəˈpaɪrəs / pə-PY-rəs) is a material similar to thick paper that was used in ancient times as a writing surface. It was made from the pith of the papyrus plant, Cyperus papyrus, a wetland sedge. [1] Papyrus (plural: papyri or papyruses[2]) can also refer to a document written on sheets of such material, joined side by side and ...

  6. Hold (compartment) - Wikipedia

    en.wikipedia.org/wiki/Hold_(compartment)

    A cargo hatch or deck hatch or hatchway is type of door used on ships and boats to cover the opening to the cargo hold or other lower part of the ship. To make the cargo hold waterproof, most cargo holds have cargo hatch. This can be a waterproof door, like a trap door with hinges or a cover that is places on top of the cargo hold opening ...

  7. Boat building - Wikipedia

    en.wikipedia.org/wiki/Boat_building

    Boat building is the design and construction of boats (instead of the larger ships) — and their on-board systems. This includes at minimum the construction of a hull , with any necessary propulsion, mechanical, navigation, safety and other service systems as the craft requires.

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