– Th? Hello?n s? chuyên nghi?p c?a nhà s?n xu?t trong khâu ti?p th? s?n ph?m.The cold finger reservoir should be have to be stuffed with liquid nitrogen before the microscope is used. Contaminants at times result in a phenomenon referred to as drift. Drift is the clear "motion" in the specimen across the monitor. It is actually a result of lou