Spondylosis is Osteoarthritis, so lumbosacral spondylosis would be osteoarthritis in the lumbosacral area of the spine. Here is a link to an article about cervical osteoarthritis, which is similar. http://www.webmd.com/osteoarthritis/guide/cervical-osteoarthritis-cervical-spondylosis.
MOTOR CONTROL CENTER. A motor control center consists of one or more vertical metal cabinet sections with power bus and provision for plug-in mounting of individual motor controllers. Very large controllers may be bolted in place but smaller controllers can be unplugged from the cabinet for testing or maintenance.
Headquarters of the Department of Defense, the Pentagon is one of the world's largest office buildings. Built in just 16 months, the Pentagon is the worlds largest low-rise office building.