A heat exchanger tube having an integral restricting and turbulating structure consisting of dimples formed by confronting indentations pressed into the sides of the heat exchanger tube. The protective treatment is particularly efficacious for airfoils of compressor bladesvanes of gas turbine engines and airfoils of airfoils and certain components of steam turbine engines. The sealing plate has a metal core, press fit into the outer member, and a sealing member, integrally vulcanized adhered to the metal core. The torque transmitting devices are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio. The plane-wave responses for each feature are combined to generate a modeled pattern response.