1. A lokacin da installing da bawul, kana bukatar ka tsaftace ciki rami da sealing surface, ko a haɗa kusoshi suna ko'ina tightened, da kuma duba ko shiryawa da aka guga man.2, shigarwa na bawul yana cikin yanayin rufewa.3, babban-size ƙofar bawul, pneumatic ...
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