How os oil useful to machine?

YOU CAN REFERENCES: It acts as an early warning system. Fuel supports vital machine components including the engine, transmission, axels, brakes and hydraulics system. ... This provides technicians with early warnings signals for machine parts, giving customers time to replace any components that are susceptible to damage or failure.2 thg 8, 2019

Explanation:

I'm not sure but hope it helps.

is this your complete question

normally working animals are domesticated and ruled by a master, a domesticator (tamer), to perform basic and important functions on a farm, for example. the value used in this context is animal labor in exchange for food. it is not so much a contrast to the story told by napoleon and the pigs, since the animals of that particular farm also performed functions on the farm through domestication. the only thing is that in this case, who rules them is a pig, also an animal, but very respected, to whom the other animals lent him submission. that's about a strong relationship of dependency between animal and owner.