The shunt includes a fluid passageway.

The metal-made body (2) has a fluid flow-in passage (2a), a fluid flow-out passage (2b), and a communication passage (2c) connecting the flow-in and flow-out passages.

The second fluid passage (21) uniformly surrounds the first fluid passage (20).

Within the first layer, the fluid path will contain a plurality of fluid fins which control the flow of a fluid within the fluid path.

The second fluid passage is in fluid communication with the first fluid passage.

The heat exchanger has a first fluid passage and a second fluid passage.

An apparatus for axially transferring fluid may comprise an elongated shaft defining a first fluid passageway axially therethrough and a second fluid passageway from an outer surface thereof to the first fluid passageway.

Fluid flowing through a venturi nozzle (24) in the fluid bypass passageway that intersects the fluid exhaust passageway lowers the pressure in the fluid exhaust passageway.

Second fluid passage (44) comprises at least one fluid channel circumferentially extending along first fluid passage (43).

A fluid flow modulator can be provided in the fluid processing passageway if a fluid processing passageway is provided.

The rotatable sleeve has a fluid conducting path therein, such that the fluid conducting path is in fluid communication with the fluid circulation passage in the roll.

A diaphragm separates a chamber from the fluid passageway and a balancing passage fluidly connects the fluid passageway with the chamber.

According to another embodiment, a flow rate regulator comprises: the device for directing the flow of a fluid; a second fluid passageway; a third fluid passageway; and a fourth fluid passageway.

The nozzle defines a nozzle fluid passageway.

The shunt includes a fluid passageway.