Cazuela de Vaca (Beef and Pumpkin Stew) This hearty Chilean stew of beef, corn, and pumpkin is a one dish meal. The main ingredients are stewed in serving-sized pieces, so that each person receives a large piece surrounded by a broth with the other vegetables.
Quick Answer. A rotary vane vacuum pump works by using centrifugal force to turn blades against the circular surface of a cylinder whereby pockets of air are pushed from an inlet port to an outlet port as air pressure increases.
With submersible pumps the electric motor and the pump are installed inside the well as a single cylindrical unit, so the pump actually pushes the water up. In contrast, jet pumps act like a long straw, using high pressure to create a vacuum suction that draws water to the surface.