A method for recognizing three-dimensional control points and a computer readable medium using the same are disclosed. The free male end surface is socketed before expansion into a partially transverse shoulder surface of the female housing through the matching rebating shapes of the surfaces. Said electric valve is disposed in the lead so that a flow of current through the lead can be released and blocked. The end of the second superconducting module is disposed geometrically opposite the end of the first superconducting module.