Haɗoowo caggal
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Haɗoowo doggol caggal,Valve TWS
Janngu ko heewiBackflow preventer ko ɓuri heewde huutoreede ko e dokkal ndiyam gila e yuɓɓo wuro haa e yuɓɓo njuɓɓudi laamu ina tiiɗtina ɓuuɓri tuugnorgal mbele ɓuuɓri ndiyam ina waawa wonde tan laawol gootol. Gollal maggal ko haɗde ruttaade caggal e nder weeyo tuugorgal walla kala sarɗi sifon ruttaade caggal, ngam daɗde e pollugol ruttaade caggal.
