| 摘要 |
<p>PCT No. PCT/DE87/00388 Sec. 371 Date May 12, 1988 Sec. 102(e) Date May 12, 1988 PCT Filed Aug. 29, 1987 PCT Pub. No. WO88/02082 PCT Pub. Date Mar. 24, 1988.A valve seal having a profiled ring of a rubber elastic material, and an externally threaded supporting ring which is disposed about and vulcanized to the ring. The external portion of the supporting ring projects outwardly beyond the external surface of the profiled ring.</p> |
