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.
Wheelhouse (mining), known in some parts of the world as a Radstube, is a building or underground chamber in a mine housing a water wheel; Nautical context. Bridge (nautical), also known as a pilothouse, the location of the ship's wheel of a boat or ship; The covering or housing of a paddle wheel in a paddle steamer also known as the paddle-box