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2. Towing - Wikipedia

   en.wikipedia.org/wiki/Towing

   Large ballast tractor pulling a heavy load (a transformer) on a hydraulic modular trailer using a drawbar. A British Airways Concorde being towed in New York City. Towing is coupling two or more objects together so that they may be pulled by a designated power source or sources. The towing source may be a motorized land vehicle, vessel, animal ...

3. 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.

4. Dorade box - Wikipedia

   en.wikipedia.org/wiki/Dorade_box

   Dorade boxes operate on the principle that air can pass relatively freely through the chambers, yet rain or sea wash will be trapped in successive chambers and drain out of the small holes in the sides of the box. The principle can be applied to other forms. For example, one variant has a circular layout with the baffles as concentric rings.

5. Trailer (vehicle) - Wikipedia

   en.wikipedia.org/wiki/Trailer_(vehicle)

   A boat on a single-axle trailer. A trailer is an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials. Sometimes recreational vehicles, travel trailers, or mobile homes with limited living facilities where people can camp or stay have been referred to as trailers.

6. Intermodal container - Wikipedia

   en.wikipedia.org/wiki/Intermodal_container

   Intermodal container. A 40-foot-long (12.2 m) shipping container. Each of its eight corners has an essential corner casting for hoisting, stacking, and securing. Containers stacked on a large ship. An intermodal container, often called a shipping container, or cargo container, (or simply “container”) is a large metal crate designed and ...

7. 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.