DIN EN 60444-1:1997-10
Отменен
Measurement of quartz crystal unit parameters by zero phase technique in a pi-network - Part 1: Basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a pi-network (IEC 60444-1:1986); German version EN 60444-1:1997
— 17 стр.
