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19/11/2021 · Rock Bolt 2021-11-19 14:25:38 Rock Bolt for Hydropower Plant Project Specification : Outer Rebar Dia - 21.7mm Thread - M22 Yield Load - 230kN UTS - 290kN Bore Diameter Range - 44 - 51 mm Delivery Length - 2.4 m Qty : 500 pcs Destination Port : CIF Jakarta Wechat: OneSol
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1/2/2015 · Rock bolting is the major reinforcement pattern in underground coal mines in China and other major coal mine countries (Peng and Tang, 1984, Hou et al., 1999, Mark et al., 2001). The strength of bolt material has increased significantly in the past 30 years, from low to high and very high strength (Kang and Wang, 2007).
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