| 摘要 |
In summary, and as best shown in Fig. 1, this housing comprises
- four rectangular panels (20, 30, 40, 50) cut in equal lengths from a metal or plastic extrusion,
- a pair of side rails (22, 32, 42, 52) extending along opposite sides, respectively, of each panel,
- a plurality of right angular corner clips (14) releasably securing together the ends of the four panels to form a rectangular housing (10), and with the legs of the clips (14) frictionally secured by spring members (17) in registering recesses (16) in adjacent ends of the side rails,
- a metal handle (61) extending transversely across one end of the housing and having rolled edges (62) slidably mounted in other recesses (19) in the side rails, and
- a resilient gasket (G) seated in further recesses (15) in said side rails for sealingly connecting opposite ends of the housing in a conduit, and wherein
- each panel (20 min , 30 min , 40 min , 50 min ) may comprise a plurality of interconnected extrusions (30-1, 30-2, 40-1, 40-2, 50-1, 50-2).
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