BS ISO TR 11552:1997 Lasers and laser-related equipment. Laser materials-processing machines. Performance specifications and benchmarks for cutting of metals
1998BS ISO TR 11552:1998 Lasers and laser-related equipment - Laser materials-processing machines - Performance specifications and benchmarks for cutting of metals
1998BS ISO TR 11552:1997 Lasers and laser-related equipment. Laser materials-processing machines. Performance specifications and benchmarks for cutting of metals