2015SJ/T 2215-2015 Measuring methods for semiconductor photocouplers
1982SJ 2215.10-1982 Method of measurement for direct current transfer ratio of semiconductor photocouplers
SJ 2215.10-1982 Method of measurement for direct current transfer ratio of semiconductor photocouplers was changed to SJ/T 2215-2015 Measuring methods for semiconductor photocouplers.