Why do chainsaws leak bar oil?

Nobody likes a messy and oily chainsaw, that's for sure. But these tools seem to leak oil quite regularly; is it normal, or ...
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Cutting risks – Tulsa District holds chainsaw safety training at Fort Gibson Lake

FORT GIBSON, Okla. –The Tulsa District U.S. Army Corps of Engineers held a chainsaw safety course at Fort Gibson Lake from March 3-7. This training was conducted in response to recent chainsaw-related ...