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2. TV tray table - Wikipedia

   en.wikipedia.org/wiki/TV_tray_table

   TV tray tables became popular in the 1950s as a way to hold food and beverage items while watching TV, the iconic item being a TV dinner. [1] National advertising for TV tray tables first appeared in 1952, a full year before Swanson introduced the TV dinner in October 1953. A set of four TV tables were sometimes sold mounted on a small rack ...

3. Mac Pro - Wikipedia

   en.wikipedia.org/wiki/Mac_Pro

   The redesigned Mac Pro released on December 10, 2019 has a rack-mount version, available in the same configurations as the standard Mac Pro for a $500 premium. [116] The rack-mounted Mac Pro comes with mounting rails to mount it in a server rack, and fits in a 5 Rack Unit (or "U") space. [117] The Apple silicon Mac Pro also comes in a rack ...

4. Cable tray - Wikipedia

   en.wikipedia.org/wiki/Cable_tray

   These trays may be made of wire mesh, called "cable basket", [2] or be designed in the form of a single central spine (rail) with ribs to support the cable on either side. Channel Tray provides an economical support for cable drops and branch cable runs from the backbone cable tray system.

5. Rigid chain actuator - Wikipedia

   en.wikipedia.org/wiki/Rigid_chain_actuator

   Rigid chain actuators function as rack and pinion linear actuators that use articulated racks. Rigid chain actuators use limited-articulation chains, usually resembling a roller chain, that engage with pinions mounted on a drive shaft within a housing. The links of the actuating member, the “rigid chain”, are articulated in a manner that ...

6. Film chain - Wikipedia

   en.wikipedia.org/wiki/Film_chain

   Type of film island—film chain, a top view Film Chain with 16mm projectors and a slide wheel at Armed Forces Radio and TV AFRN – AFRTS station WVCX/WVCQ. A film chain or film island is a television – professional video camera with one or more projectors aligned into the photographic lens of the camera. With two or more projectors a system ...

7. Balanced-arm lamp - Wikipedia

   en.wikipedia.org/wiki/Balanced-arm_lamp

   A balancing arm (the forearm) has on one side of an axis a small counterweight and on the other side a lamp cap. These parts are lifted by a second bigger balancing arm (the upper arm) that has on the other side of a second axis a heavier counterweight. The lamp designed by Edouard-Wilfrid Buquet in 1927 works in this way.