| 摘要 |
According to the present invention a device for the passage of cannels in ceilings or walls comprises a pair of sheet pieces in the form of a lower collar (1) or a support plate for mounting below an external ceiling or wall lining and a support plate (2) for mounting below an internal ceiling or wall lining. For the passage of one or more channels (3), the two sheet pieces (1, 2) are formed with at least one opening and the respective opening is provided with a flexible gasket (5, 7) dimensioned for tight-fitting engagement with an external circumferential surface of the corresponding channel (3).
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