| 摘要 |
PROBLEM TO BE SOLVED: To develop and supply an EF socket joint capable of reducing a melting work step, reducing work and material costs, supplying a socket added with a new function associating a purge hole and improving workability.SOLUTION: This invention provides means for solving the first to fourth problems by supplying an EF socket joint with a purge hole at a site that is arranged when the purge hole is manufactured and molded. |
