High frequency pulsing solid state laser marking coronavirus (COVID-19) testing instrument   In the important period when the epidemic is not over, in the important period when the whole people are fully resisting the epidemic, large-scale nucleic acid testing has occurred from time to time. And the use of nucleic acid testing reagents has contributed to the control of the epidemic in our country. Regarding the production batch number, date and other information marked on the surface of the nucleic acid detection kit, how to make it clear and not easy to erase, RFH handed these perfectly.