A charge air cooler assembly for an internal combustion engine is described. The actuator plate has a laminated structure including a piezoelectric layer which is deformable at least in a planar direction thereof by an application of an electric field to the piezoelectric layer, and a planar diaphragm laminated on the piezoelectric layer. The chipping mat may include a plurality of sections of artificial turf, each simulating a different type of grass found on a golf course, such as the fairway, rough, and deep rough. In the case of the concave ski each side comprises a rectangular edge wear part coupled with a side blade for a total of four wear blades.