Backflow khamnak
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Backflow khamnak, TWS Valve
Tam deuh relKhuachung in a tlangpi in ti thurhnawm chuahnak hmun ah ti peknak caah hmanmi hnulei luannak khamnak sii nih ti luannak cu lam pakhat lawng a si khawh nakhnga pipeline hneknak kha fek tein a kham. A riantuannak cu pipeline medium asiloah zeibantuk dirhmun hmanh ah siphon a luan tthanmi kha kham a si, cu nih cun a luan tthanmi thurhnawmhnak hrial khawhnak ding caah a si.
