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Mtengo wa magawo THREADBAR BOLT
Threadbar Bolt yomwe imagwiritsidwa ntchito padenga lozikika kapena lotchingidwa ndi nthiti ndi nthiti, yokhala ndi nthiti pamwamba pake, bolt ya ulusi imatha kupereka kusakanikirana kwa utomoni ndi kusamutsa katundu.Amagwiritsidwanso ntchito kwambiri pothandizira pansi pantchito zamigodi, ngalande ndi malo otsetsereka
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Mbiri ya ROUNDBAR BOLT
Roundbar Bolt ili ndi malekezero, itha kugwiritsidwa ntchito ngati makina okhazikika kapena okhazikika.Ndi mitundu yosiyanasiyana ya mtedza ndi makina ochapira, imatha kukhazikitsidwa mwachangu kwambiri ndipo imawoneka ngati imodzi mwazinthu zotsika mtengo kwambiri zowongolera pansi m'mafakitale amigodi ndi ma tunneling.