4IIAVARASAN P M,MOL IAN P A.Laser cutting of thick sectioned steels using gas flow impingement on the erosion front[Jl,Journal of Laser Aoolications, 1995.7(4) : 199-209.
5HULL R J, LANDER M L,ERICJ J.Experiments in laser cutting of thick steel sections using a 100 kW CO2 laser[C]. ICALEO' 2000,2000, B89 : 78-86.
6MOLIAN P A.Dual-beam CO2 laser cutting of thick metallic materials[J].J. Mater Sci, 1993,28 ( 7 ) : 1738-1748.
7GEIGER M,SCHUBERTH S,HUTFLESS J.CO2 laser beam sawing of thick sheet metal with adaptive optics [J]. Welding in the World, 1996,37 ( 1 ):5-11.
8NIIELSEN S E, ELL IS NDual-focus laser cutting[J]. Welding in the World, 2002,46( 3-4 ) : 33-40.
9MAN H C,DUAN J,YUE T M.Design and characteristic analysis of supersonic nozzles for high gas pressure laser cutting[J]Joumal of Materials Processing Technology, 1997, 63( 1-3 ) : 217-222.