首页>
外国专利>
METHOD OF THERMALLY INSULATING PORTIONS OF CASTINGS BEINGS INSTRUMENTAL IN THE FEEING OF MOLTEN METAL TO THERMALLY CRITICAL CASTING PORTIONS DURING SOLIDIFICATION
METHOD OF THERMALLY INSULATING PORTIONS OF CASTINGS BEINGS INSTRUMENTAL IN THE FEEING OF MOLTEN METAL TO THERMALLY CRITICAL CASTING PORTIONS DURING SOLIDIFICATION