72496102 2023 115 09:00 1 4.03 Receiving optical path has been optimized, new tracking camera is installed. 
72496102 2021 354 09:00 1 5.06 Use Daheng laser  
72496102 2021 354 09:00 1 6.02.02 Event Timer is replaced by the model A033-ET/USB  
72496102 2021 286 09:00 1 9.01.02 Meridian Precision GPS TimeBase is installed