KS M ISO 20623-2018 Petroleum and related products — Determination of extreme-pressure and anti-wear properties of lubricants — Four-ball method(European conditions)
2018KS M ISO 20623:2018 Petroleum and related products — Determination of extreme-pressure and anti-wear properties of lubricants — Four-ball method(European conditions)
2004KS M ISO 20623:2004 Petroleum and related products-Determination of the extreme-pressure and anti-wear properties of fluids-Four ball method(European condition)