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.
All of the above answers are correct as to the differences/pros/cons of hydros vs. lattice boom (conventional) cranes. Another difference between hydros and lattice boom cranes is primarily the manner in which the booms themselves act as structural members during a pick.