An open system was less trouble than recirculation, in the short term.

For this reason several different recirculation methods have been developed.

That means closed doors and the recirculation of cleaned used air.

Water conservation and recirculation had gained importance in these dry areas.

Fortunately, they had plenty of air, and their recirculation system worked to perfection.

Engineers suspect the fuel is coming from one of three recirculation pumps.

In addition, a new exhaust gas recirculation system improved emissions control.

Still, the project requires sophisticated water recirculation technologies to function in a desert.

The low exiting velocity is much more susceptible to recirculation.

Most modern engines now need exhaust gas recirculation to meet emissions standards.

Emissions are claimed to be well below 10 parts per million even without exhaust gas recirculation.

The height of this region may be increased to increase the thermal natural recirculation pumping head.

This water can be recaptured by a recirculation system and pumped back into the lake.

One of the drawbacks to recirculation aquaculture systems is water exchange.

The constant recirculation action in the former continuously polishes the water with every pass.

Emissions regulation included the fitting of an exhaust gas recirculation system.

Charcoal filters (about £12 each; replace every four months) are found only in recirculation units.

The cabin has a recirculation fan which aids in cooling and heating.

The royal enclosures had the most sophisticated water distribution and recirculation systems.

There does not appear to be any entero-hepatic recirculation.

Bubbles continued to jet into the coolant and recirculation tubes.

It's not like it's going to float off down the corridor and get into the air recirculation, here.

The recirculation in the base zone of the wedge can then raise the pressure there to near ambient.

Also, not shown in Figure 2 is the slurry delivery/recirculation/filtering system.

The final link in the pool recirculation system: skimmer-pump-filter-returns are the water returns.