Abstract: An annular wall for the combustion chamber of a turbomachine has a cold side and a hot side, said wall being provided with a plurality of primary holes and a plurality of dilution holes distributed in circumferential rows, together with a plurality of cooling orifices that are distributed in a plurality of circumferential rows that are spaced apart axially from one another, the number of cooling orifices being identical in each row thereof, and the wall further including bores disposed immediately downstream from the primary holes and from the dilution holes and distributed in circumferential rows, the bores in any one row presenting a substantially identical diameter, being spaced apart at a pitch that is constant, and presenting intrinsic characteristics that are different from the intrinsic characteristics of the cooling orifices of the adjacent rows.

Abstract: An installation for electrostatic deposition of powder on objects travelling continuously, by means of a conveyor, through a treatment cage with a side entrance and exit comprises a filtering system, a system for supplying powder and compressed air and a tank for recovery of powder. The cage comprises at least two modules, namely, a first module for storing, projecting and recovering powder, which contains elements for projection of powder onto the objects to be processed, and a second module for filtering and recycling the air in which the air loaded with powder originating from the first module is filtered and recycled to the first module. The cage includes at least one air lock to prevent escape of powder laden air to the exterior of the cage.