Mechanical galvanizing self drilling screw

Mechanical galvanization imalola zomangira kuti zigwirizane ndi ma protocol osiyanasiyana oyesa dzimbiri popereka zokutira zinki. Zomangira zimatha kukana kupopera mchere komanso kuyezetsa kwa Kesternich kwa nthawi yayitali, kuwonetsa mphamvu zawo pamalo ochita dzimbiri. Kutsatira miyezo ngati ASTM B117 kumatsimikizira kuthekera kwawo kolimbana ndi dzimbiri.
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