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- Coating thickness of heavy hex boltsBolts that are made of high-strength steel or require a larger pre-tightening force can be called heavy hex bolts. High-strength bolts are mostly used for the connection of bridges, steel rails, high pressure and ultra-high pressure equipment. The fracture of this kind of bolt is mostly brittle fracture. High-strength bolts applied to ultra-high pressure equipment need to be prestressed in...0 التعليقات 0 المشاركات 7081 مشاهدةالرجاء تسجيل الدخول , للأعجاب والمشاركة والتعليق على هذا!
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