at least one of them being a compound of the type covered by group C10M121/00

Full Title

Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential (inorganic materials coated with organic compounds C10M113/16) > at least one of them being a compound of the type covered by group C10M121/00