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.
Diseases carried by house flies include typhoid, cholera and dysentery. Other diseases carried by house flies include salmonella, anthrax and tuberculosis. House flies have also been known to transmit the eggs of parasitic worms.
Reactions to black fly bites that collectively are known as black fly fever include headache, nausea, fever, and swollen lymph nodes in the neck. In eastern North America, only about six black fly species are known to feed on humans. Several other species are attracted to humans, but they typically do not bite.