Consists of two rotors with blades on one side than the other-common in modern vehicles. There are also designs that use sliding blades on the rotor, as well as a dry oil pan refueling system, which relies on a pair of oil pumps to keep the entire rotating assembly lubricated. Each type of pump pushes the oil through the engine's oil filter, and then pushes it up to the top through the motor, and the oil pump motor drops back down into the oil pan again. There are also pressure valves that are opened so that the oil does not pass through a psi that may damage the component. In short, there are different pump designs in modern vehicles, but they are an integral part of getting a car's engine running. When a large amount of oil is being pumped out; the low oil content in the tank results in reduced suction. This is when the pump is used to suck in the filter on the left and flush the hose with air blow. In most ship designs, the pump room consists of multiple centrifugal pumps as the main cargo pump; as the cargo pump. The entire assembly is connected together; it can draw water from the slope tank and the bottom of the tank. This is convenient when transferring cargo from one fuel tank to another; at a port in a cargo pump, the centrifugal pump is driven by a steam turbine; the pump is located in the pump room, and the turbine part is located in the engine compartment. A complete cargo operation that is unloading includes three points; cargo pump operation, inert gas system, and advance planning (plan ahead). Key features such as cargo sequence, temperature, characteristics, quantity, pressure, pumping speed; fuel tanks to be unloaded, manifold connections to be used, communication methods and emergency procedures are pre-planned and agreed for specific cargo operations Officials control cargo operations from a location called a cargo control room on an autonomous vessel. Once the lines are lined up and the inert gas system is on standby; start the cargo pump at low speed. This is done so that there are no leaks or malfunctions at intersections or decks in cargo or IG systems.