... research institutes , such as Jilin University , Changchun Optical Precision Machinery of the Chinese Academy of Sciences , the Physics ... Related patendsNO.:ZL022920093636.X ZL200820071741.9 ZL200820071741.4Ultra type is new generation CO2 laser tube , mainly used in high ... CO2 laser tube is typical presentation of ultra type, it have high power and stable beam , is designed for thick plank cutting ...