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 Liebherr LR 13000 is the most powerful crawler crane in the world. Designed for use in nuclear power station construction, the LR 13000âs main boom can reach a height of 473 feet, and the crane has a lifting capacity of 3,000 tons. The crane itself weighs 748 tons.