This form of circlip often used in assemblies subjected to strong centrifugal forces, is also secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.his form of circlip often used in assemblies subjected to strong centrifugal forces, is also secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.
Frequently Asked Questions about Black Fly Dangers. Q: Can Black Flies carry diseases? A: Yes, they have been known to transmit diseases to humans and animals. In Africa, Central America and South America, Black Flies can transmit two diseases to humans: onchocerciasis, known as âriver blindness,â and mansonellosis.
Cool-Season Flies. Just when you think you'll get relief from summer flies as the weather cools, you might notice flies that hang around in the winter -- sometimes in large numbers. Although these flies are a nuisance, they don't carry bacteria like house and blow flies. They live in a semi-dormant state as adults in the winter, typically in the upper areas of your home such as a second story or attic. They fly around occasionally, but usually, you'll notice them congregating in warm areas.