A pilonidal cyst is a unique kind of abscess that occurs in or above the crease of the buttocks. Pilonidal cysts often begin as tiny areas of infection in the base of the area of skin from which hair grows (the hair follicle).
Cofferdam A cofferdam is a temporary enclosure built within, or in pairs across, a body of water and constructed to allow the enclosed area to be pumped out, creating a dry work environment for the major work to proceed.
what does doffer mean in english? Doffer A doffer is someone who clears full bobbins, pirns or spindles holding spun fiber such as cotton or wool from a spinning frame and replaces them with empty ones.