This standard specifies the technical conditions for L-CKB, L-CKC and L-cKD industrial closed gear oils prepared from refined lubricating oil distillate as base oil and added with various types of additives.
GB 5903-1995 history
2011GB 5903-2011 Gear oils for industrial enclosed gear system
1995GB 5903-1995 Gear oils for industrial enclosed gear drives