A heat-resistant magnesium alloy is for casting, and includes Ca in an amount of from 1 to 15% by mass, Al in a summed amount of from 4 to 25% by mass with the amount of Ca, and the balance being Mg and inevitable impurities when the entirety is taken as 100% by mass. The cams are produced by bending together the ends of long profile strips or by bending and putting together several pieces of profile strips in a circumferential direction. A hybrid completely non-mechanical system exhibits temperature uniformity and reliability, saves space, requires extremely low operating energy and minimizes need for air conditioning in the operating environment. A leachate storage tank is fluidically connected to the leachate bay reactor, which facilitates hydrolysis. The second outer layer may have a density of between about 0. The branch lines are formed of a layer different from that of the gate lines, arranged parallel to the gate lines, and each connected thereto.