NA 121

DIN Standards Committee Tools and Clamping Devices

DIN ISO 9138 [CURRENT] references following documents:

Document number Edition Title
ISO 9136-2 1999-10 Abrasive grains - Determination of bulk density - Part 2: Microgrits More 
ISO 9284 2013-04 Abrasive grains - Test-sieving machines More 
ISO 9285 1997-01 Abrasive grains and crude - Chemical analysis of fused aluminium oxide More