GOST 8.021-1984 State system for ensuring the uniformity of measurements. State primary standard and state verification schedule for means measuring mass
2015GOST 8.021-2015 State system for ensuring the uniformity of measurements. State verification schedule for mass measuring instruments
2005GOST 8.021-2005 State system for ensuring the uniformity of measurements. State verification schedule for mass measuring instruments
1984GOST 8.021-1984 State system for ensuring the uniformity of measurements. State primary standard and state verification schedule for means measuring mass