| 摘要 |
A HOLLOW VENTILATION DUCT SEGMENT AND METHOD OF FORMING THE SAME Abstract A hollow ventilation duct segment (10) comprises a duct wall (11), a coupling strip (16) and a joiner sleeve (20). The duct wall (11) has a first end (12), a second end (13), an inner surface (14) and an outer surface (15). The coupling strip (16) has a first end (17) and a second end (18). The coupling strip first end (17) is longitudinally positioned substantially between the duct wall first end (12) and the duct wall second end (13) and has one or more connector regions. The coupling strip second end (18) is substantially adjacent to the duct wall second end (13). The joiner sleeve (20) has a first end (21) and a second end (22). The joiner sleeve first end (21) is longitudinally positioned between the duct wall first end (12) and the coupling strip first end (17). The joiner sleeve second end (22) is substantially adjacent to the duct wall second end (13). Ku |
