GOST 8.498-1983 State system for ensuring the uniformity of measurements. State primary standard and state verification schedule for means of measuring electrical quality factor
1998GOST 8.498-1998 State system for ensuring the uniformity of measurement. State verification scheme for means of measuring electrical quality factor
1983GOST 8.498-1983 State system for ensuring the uniformity of measurements. State primary standard and state verification schedule for means of measuring electrical quality factor