G: | SECTION G PHYSICS |
G01: | MEASURING; TESTING |
G01R: | MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES |
G01R35/00: | Testing or calibrating of apparatus covered by the other groups of this subclass |
G01R35/04: | . of instruments for measuring time integral of power or current |
G01R35/06: | . . by stroboscopic methods |