2016DIN EN ISO 2157:2016-10 Dentistry - Nominal diameters and designation code numbers for rotary instruments (ISO 2157:2016); German version EN ISO 2157:2016
2016DIN EN ISO 2157:2016 Dentistry - Nominal diameters and designation code numbers for rotary instruments (ISO 2157:2016); German version EN ISO 2157:2016
1995DIN EN ISO 2157:1995 Dental rotary instruments - Nominal diameters and designation code number (ISO 2157:1992); German version EN ISO 2157:1995