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PROCEDURES RELATING TO A DAY FLIGHT AND DAY FLIGHT FLIGHT
PROCEDURES RELATING TO A DAY FLIGHT AND DAY FLIGHT FLIGHT
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机译：有关一日航班和一日航班的程序
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PCT No. PCT/FI92/00249 Sec. 371 Date Apr. 11, 1994 Sec. 102(e) Date Apr. 11, 1994 PCT Filed Sep. 22, 1992 PCT Pub. No. WO93/08346 PCT Pub. Date Apr. 29, 1993.The invention relates to a method in connection with a roof drainage apparatus and a roof drainage apparatus. The invention comprises a trough (2) recessed in a roof structure (1), an opening (3) arranged in the bottom of the trough, a water-outlet tube (4) joined to the opening and a means (5) for changing an open water flow into a closed flow when the water flow is increasing. For intensifying the drainage, an element (6) is positioned in the water-outlet tube (4) at a throat after the opening (3), by means of which element the cross-sectional area of the water-outlet tube (4) is regulated in such a manner that the shape of the cross-section of the water-outlet tube (4) remains substantially unchanged at the regulation.
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