DIN EN ISO 6743-4-2015 润滑剂、工业用润滑油和相关产品(L类).分类.第4部分:H族(液压系统)(ISO 6743-4-2015);德文版本EN ISO 6743-4-2015
Lubricants, industrial oils and related products (class L) - Classification - Part 4: Family H (Hydraulic systems) (ISO 6743-4:2015); German version EN ISO 6743-4:2015