A pump is the name given to a mechanical device used to transport liquids. Also known as a pump or basak. These are pumps used in liquid transmission. Pumps are not of one type and model. Each is made of a special material for the liquids they will deliver. If an acid substance is to be used, the pump used to transfer the acids is made of durable materials such as ebonite, lead, aluminum, and iron. The pump material also varies depending on the type of acid.