A femoral slideway and a femoral slidewayfemur-size template combination is employed to create an installed knee prosthesis that creates a reduced amount of stress in the collateral ligaments relative to previous prostheses. The printing member comprises on a substrate a photosensitive layer soluble or dispersible in ink andor fountain solution and capable of hardening upon exposure to a laser. When message processing completes, the history of message communication is checked, so that the stored message or messages are transmitted in a single message communication operation. 9 or less with stirring to leach at least gold in the material into the gold leaching solution by the oxidative activity of the ferric ions contained in the gold leaching solution, wherein the concentration of gold is reduced by selectively removing gold from part or all of the gold leaching solution during gold leaching. In addition, a momentum exchange zone is located at the exhaust output of the accelerating element.