GOST 8.120-2014 State system for ensuring the uniformity of measurements. State traceability scheme for the instruments instruments intendend for measuring pH
2014GOST 8.120-2014 State system for ensuring the uniformity of measurements. State traceability scheme for the instruments instruments intendend for measuring pH
1999GOST 8.120-1999 State system for ensuring the uniformity of measurement. State verification schedule for means measuring pH