Bore hole drilling machine (DDW-600) DDW-600 drilling rig is the integral steel-tracked chassis model with powerful mobile capability; advanced negative feedback 1  ... DW/TXS Construction Equipment (Beijing) Co., ...
Levitation. Maglev trains have no contacts with the rails while they move forward. They are levitated on the guide-way with the help of magnetic forces. Levitation is the process by which an object is suspended against gravity in a stable position without any physical contact.
The magnetically levitated spacecraft would be accelerated at speeds up to 600 mph and then shift to rocket engines for launch to orbit. A 50-foot track was built at Marshall in mid-1999 for testing and design analysis of maglev concepts for space propulsion.