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.
Bridge / Overhead Crane Safty. Overhead cranes can be used outdoors and indoors. A bridge crane requires a stable track. These are most commonly projected out from the concrete masonry. However, it is not a big problem if this design is not used, as a workspace can be equipped with this type of crane using simple steel beams.