Backflow flap for sewer shafts comprises a carrier body, a flap-and-float unit, a hinge joining the carrier body and the flap-and-float unit, and a stop
摘要
<p>The backflow flap for sewer shafts comprises a carrier body (5), a flap-and-float unit (1, 2, 4), a hinge (3) joining the carrier body and the flap-and-float unit, and a stop (6) corresponding to the shape of the channel (8).</p>
