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An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.
There were 94.4 males per 100 females in the city limits. In 2019, the median age was 29.8 years; according to Move.org in 2016, Lubbock and its metropolitan area was the 6th best for residents aged 20 and older. [45] The Lubbock area was also first in Texas for Millennial home-ownership, and 14th in the U.S. in 2020. [46]
The Metro Tower, also known as the NTS Tower, is an office high-rise building located in Lubbock, Texas. Completed in 1955, it is the tallest building in Lubbock at 274 feet (84 meters). [ 2 ] The 20-story building was originally known as the Great Plains Life Building after an insurance company that was its first occupant.
A pilot ladder has specific regulations on step size, spacing and the use of spreaders. It is the use of spreaders (long treads that extend well past the vertical ropes) in a pilot ladder that distinguishes it from a Jacob's ladder. When not being used, the ladder is stowed away, usually rolled up, rather than left hanging.
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Trans-Texas Airways became Texas International in 1969 and began jet service with DC-9's on a Denver-Amarillo-Lubbock-Austin-Houston route. [ 11 ] By 1976 all scheduled passenger airline flights at Lubbock were jets: Braniff Boeing 727-100s and Boeing 727-200s , Continental 727-200s and Texas International Airlines Douglas DC-9-10s . [ 12 ]
The first Lubbock County Courthouse was used from 1891 to 1916. The second Lubbock County Courthouse remained open until 1968, though a third courthouse had been built in 1950. Lubbock County is a county located in the U.S. state of Texas. The 2020 census placed the population at 310,639. [1] Its county seat and largest city is Lubbock. [2]
Ladder logic is widely used to program PLCs, where sequential control of a process or manufacturing operation is required. Ladder logic is useful for simple but critical control systems or for reworking old hardwired relay circuits. As programmable logic controllers became more sophisticated it has also been used in very complex automation systems.
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