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.
Sanitation is critical to controlling these pests, but accurate identification is essential for successful fly control. Here are some other things you should know about flies and fly control: 1  Depending on the species, the life expectancy of a fly is eight days to two months or, in some cases, up to a year.2  Flies belong to the order Diptera, meaning two wings. 3  There are more than 16,000 species of flies in North America.ere are some other things you should know about flies and fly control: 1  Depending on the species, the life expectancy of a fly is eight days to two months or, in some cases, up to a year. 2  Flies belong to the order Diptera, meaning two wings.