The screening apparatus comprises a tangentially disposed slurry inlet (20) and a diametrically and tangentially disposed heavy rejects outlet (22) at the end of a heavy rejects trap.

The device is preferably hooked up to a drive cylinder (48) in fluid communication with the first fluid output (20) and the second fluidinput (22).

Airflow in an outlet pipe (1) of an engine is assessed by the position of an airflow measuring member (2) movable in a divergent portion (7) of the inlet pipe (2) against the action of a spring.

In the outlet conduit (28) for purified water, between the non-return valve (32) and the tap point (38), there is provided a pressure equalizing valve (34).

This corresponds to the widening of the emission duct due to the important eruptive flow and the early stages of the formation of the caldera.

This invention is a laser medical device (10) for delivering energy to tissue to be treated.

The device includes a laser energy transmitting conduit (12) having a longitudinal axis, has a proximal end for connection to a source of laser energy, and a distal end from which laser energy transmitted by the conduit is emitted.