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.
Example of Group F structure, the Klann Organ Company, located in Waynesboro, Virginia. Building occupancy classifications refer to categorizing structures based on their usage and are primarily used for building and fire code enforcement. They are usually defined by model building codes, and vary, somewhat, among them. Often, many of them are subdivided.