Antagonistic pairs of muscles are muscle where one move the bone in one direction and the other moves it back the other way in transmission of nerve impulses to the muscles.
Demag, which manufactures and distributes telescopic and lattice boom cranes, is one of the leading mobile crane producers worldwide, with 2001 revenues of approximately $360 million.
The knuckle boom crane, also called a loader crane or articulating crane, is an engineering marvel that is widely used in Europe and is now starting to become highly sought after in North America and South America.