Duba bawul yana nufin wani bawul wanda sassan buɗewa da rufewa su ne fayafai madauwari kuma sun dogara da nauyinsa da matsakaicin matsa lamba don samar da ayyuka don toshe kwararar baya na matsakaici.
Girma: 1 ″;1-1/2 ";2 ″;
Saukewa: X9501
Bayani: Duba Valve