GOST 8.181-2014 State system for ensuring the uniformity of measurements. State verification schedule for means of measuring of evolvent surfaces's parameters and angle unclunation of line tooth
2014GOST 8.181-2014 State system for ensuring the uniformity of measurements. State verification schedule for means of measuring of evolvent surfaces's parameters and angle unclunation of line tooth
1976GOST 8.181-1976 State system for ensuring the uniformity of measurements. State special standard and all-union verification schedule for means measuring of evolvent surfaces's parameters