| 摘要 |
PCT No. PCT/GB95/00558 Sec. 371 Date Nov. 19, 1996 Sec. 102(e) Date Nov. 19, 1996 PCT Filed Mar. 15, 1995 PCT Pub. No. WO95/27165 PCT Pub. Date Oct. 12, 1995A duct for extending through an aperture in a wall or partition and comprising a sleeve and outwardly extending flanges to overlie the opposed outer surfaces of the wall or partition at the opposite ends of the sleeve and at least one of the flanges being constructed to be pushed onto an end of the sleeve to lockingly engage the sleeve end./! |
