| 摘要 |
<p>PCT No. PCT/EP96/04753 Sec. 371 Date May 12, 1998 Sec. 102(e) Date May 12, 1998 PCT Filed Nov. 1, 1996 PCT Pub. No. WO97/16711 PCT Pub. Date May 9, 1997A sewage structure in the form of a drain, inspection shaft or the like, consists particularly of one or several hollow concrete with at least one connection for a sewage pipe. The inventive sewage structure is provided at its inner wall with a contacting form region for supporting a test seal in a fluid-tight test position.</p> |
