the metal sheet laser cutting machine cutting the sheet metal plate with the sparking light high-speed cutting, laser welding, laser cutting technology, laser welding machine-technology manufacturing - 等離子切割機 個照片及圖片檔激光, 工業
technician supervising the operation of a laser cutting machine at a metal factory - 等離子切割機 個照片及圖片檔工業風, 背面拍攝, 工業
Don King, a plasma operator from Philadelphia, operates a plasma cutter at the Aker Shipyard in Philadelphia, Pennsylvania, Thursday, Aug. 16, 2007....