A relatively new engineering machine is a launching gantry, which is used to erect girders. Why "launch"? - launching girder
Obviously, a horizontal truss crane lies on two pillars and beams instead of the elevators in the building of a bridge. What I'm trying to understand why the word "release" is used. Is the "liberation" means "air" or something?
Monday, December 28, 2009
Launching Girder A Relatively New Engineering Machine Is A Launching Gantry, Which Is Used To Erect Girders. Why "launch"?
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