Kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl ye kɔl A lëu bï ya tɔ̈ɔ̈u në kë a kɔc wɛ̈t, ka tɔ̈ɔ̈u në flange pipe connection, wall connection ku pump station pipeline. Wala tɩŋ-a kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ kɔnɔ. Square wala rectangle exit, structure simple, work reliable, no human operation required, flange connection can also be fixed with pre-buried connections.