| 摘要 |
A section of trunking ( 20 ) has sides ( 22 ) which define a channel ( 34 ). Edge portions ( 32 ) of sides ( 22 ) are shaped so as to form further channels ( 34 ); Lid ( 26 ) has surface ( 29 ) and edge portions ( 30 ) which extend over channels ( 34 ) so as to form enclosed volumes. Screws ( 36 ) are used to fix lid ( 36 ) onto trunking section ( 20 ). Any water leaking through holes ( 38 ) and down the threads of screws ( 36 ) will be retained within channel ( 34 ) and will eventually dissipate between the side portion ( 30 ) of lid ( 26 ) and side ( 22 ) of trunking section ( 20 ). Trunking sections ( 20 ) are coupled by coupling ( 50 ) which is formed from surfaces ( 52, 54, 56, 58, 60, 62 64 and 66 ) which themselves engage internal surfaces of the trunking sections and their respective lids. Coupling ( 50 ) is provided with pairs of threaded holes. |
