The document specifies a method for the sampling and splitting of a lot of abrasive grains. This method may be used in the comperative testing of uniformly produced abrasive grains.
DIN ISO 9138:1996 history
2018DIN ISO 9138:2018 Abrasive grains - Sampling and splitting (ISO 9138:2015)
1996DIN ISO 9138:1996 Abrasive grains - Sampling and splitting (ISO 9138:1993)