BH GSO ISO 12922:2023 润滑油、工业油和相关产品(L 级) H 系列(液压系统) HFAE、HFAS、HFB、HFC、HFDR 和 HFDU 类别液压油规范
Lubricants, industrial oils and related products (class L) — Family H (hydraulic systems) — Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU