| 摘要 |
The arrangement comprises two components (10,11), each with a tubular part (12), with a longitudinal hole (15), with one end of each component forming a right-angled surface (13) to the longitudinal axis of the hole, and with the other end forming an inclined surface (16) to the longitudinal axis of the hole. The components are fitted with their inclined surface (16) against the wall exteriors with their holes positioned centrally. In this way, a path is formed which extends inclined to the wall surfaces, and which is closed outwardly by right-angled surfaces. |
