| 摘要 |
A roof drain fitting having a box-like bottom part screwed to the supporting roof over a break-through which extends through the roof. A top part having a down pipe and a collar as one unit is slipped over the bottom part. The top part is vertically adjustable to the height of a heat-insulating layer located on the roof. The bottom part and the top part are provided with heat insulation and are secured to each other with adjustable securing devices.
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