2006JIS B 9930:2006 Hydraulic fluid power -- Fluid contamination -- Determination of particulate contamination by the counting method using an optical microscope
2000JIS B 9930:2000 Hydraulic fluid power -- Fluid contamination -- Determination of particulate contamination by the counting method using a microscope
1993JIS B 9930:1993 Hydraulic fluids -- Determination of particulate contamination by the particle count method