Interior Frame Construction

Corner frame braces and leg supports, as well as 2" x 8" hardwood slate supports,
put together the strongest constructed frame in the industry today.
How do the legs attach to the frame of the table?
Other manufacturers use a 3/4" plywood plate supports with a small dado which hold it in place.
Golden West builds a structural masterpiece, A 1-3/8" x 8" x 10" thick corner block supports
the corners for the strongest frame in the industry today.