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2. Hose reel - Wikipedia

   en.wikipedia.org/wiki/Hose_reel

   A hose reel is a cylindrical spindle made of either metal, fiberglass, or plastic and is used for storing a hose. The most common styles of hose reels are spring driven (which is self retracting), hand crank, or motor driven. Hose reels are categorized by the diameter and length of the hose they hold, the pressure rating and the

3. Reel-to-reel audio tape recording - Wikipedia

   en.wikipedia.org/wiki/Reel-to-reel_audio_tape...

   Then they introduced their Twin Packs, which contained the equivalent of two LP albums but played at 3.75 ips. [ citation needed ] The heyday of prerecorded reel-to-reel tapes was the mid-1960s, but after the introduction of less complicated cassette tapes and 8-track tapes , the number of albums released on prerecorded reel-to-reel tape ...

4. Twin-lens reflex camera - Wikipedia

   en.wikipedia.org/wiki/Twin-lens_reflex_camera

   A twin-lens reflex camera (TLR) is a type of camera with two objective lenses of the same focal length. One of the lenses is the photographic objective or "taking lens" (the lens that takes the picture), while the other is used for the viewfinder system, [ 1 ] which is usually viewed from above at waist level.

5. Twin keel - Wikipedia

   en.wikipedia.org/wiki/Twin_keel

   The first twin-keeled sailing vessel is widely believed to be the Bluebird [2] that was built by Lord Riverdale and launched in 1924. Despite being the first twin-keeled yacht, and being built without much in the way of guiding engineering and science, it was quite radical as it had twin rudders (as racers have today), and a long narrow hull with a pointed, or "canoe," stern.

6. Twin-boom aircraft - Wikipedia

   en.wikipedia.org/wiki/Twin-boom_aircraft

   A twin-boom aircraft has two longitudinal auxiliary booms [further explanation needed]. These may contain ancillary items such as fuel tanks and/or provide a supporting structure for other items. Typically, twin tailbooms support the tail surfaces , although on some types such as the Rutan Model 72 Grizzly the booms run forward of the wing.

7. de Havilland Canada DHC-6 Twin Otter - Wikipedia

   en.wikipedia.org/wiki/De_Havilland_Canada_DHC-6...

   The Twin Otter has been popular not only with bush operators as a replacement for the single-engine de Havilland Canada DHC-3 Otter but also with other civil and military customers, with over 890 aircraft built. Many commuter airlines in the United States got their start by flying the Twin Otter in scheduled passenger operations.