Abstract: One or more embodiments relate to a production method of multilayer pieces comprising holes having inclined axes and the pieces being resistant to high temperatures and having a bond sub-layer and a thermal barrier coating layer (TBC) comprising depositing the bond sub-layer on the substrate of the piece, depositing the TBC layer, depositing by plasma spraying of a variable or defined composition gradient layer between the TBC layer and the bond sub-layer after the depositing step of the bond sub-layer and drilling the holes via laser beam. A method for repairing a defective piece via the method is described.

Abstract: A traction device for a wheeled vehicle arranged to be laid on the ground in engagement with a tread portion of a tire to provide a traction grip to the tire. The traction device includes a U-shaped frame and a pair of claws constructed at the ends of the U-shaped frame and arranged to engage into cavities between the tire treads by a lever action on the traction device. The traction device further includes a plurality of transverse braces extending between a pair of longitudinal bars of the U-shaped frame, each transverse brace having a pair of traction cleats extending downwardly to engage with the ground and to elevate the traction device from ground in some measure.