Box-section main bridge by Germany technical optimal design,more excellent structure,higher strength,better wear resisting rail surface;
Safer button box that could move along with the bridge freely;
Adopt flexibility flat cable and C-type rail to avoid open circuit;
Equipping electrical and mechanical anti-derail to be safer and more reliable;
Be available for two cranes moving together,travelling,lifting at the same time,accurate positioning;
Upper hoist is optional which could improve the lifting height.