Methods of forming copper interconnects free from via-to-via leakage currents and having low resistances are disclosed. A laser beam inclusive of the generated test signals is applied to a preset test recording area in a disc-shaped recording medium to record the generated test signals thereon. A green LD 1 and a red LD 2 are bonded to the metal wiring 4. The two piece configuration facilitates ease of use and manufacture by reducing the number of parts required to affix the mounting rail on the weapon. The admixture allows for acceptable workability and development of high early-strength in cementitious compositions without the use of an external heat source. A carrying rib has at least two passage ducts and for the cooling medium, at least one passage duct possessing a cooling medium supply and at least one passage duct possessing a cooling medium outlet, and these passage ducts and being in communicating connection in the radially inner hub-side end region via a deflection duct.