Subway construction Tunnel bolt segment bolt
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Subway construction Tunnel bolt segment bolt
Grade 4.8 5.8 6.8 8.8 10.9
Thread: Half/Full
Size:M6-M20
Surface: Plain,Black,YZP,ZP,HDG
Standard: GB,ANSI,BSW or Customized
Thread: Half/Full
Size:M6-M20
Surface: Plain,Black,YZP,ZP,HDG
Standard: GB,ANSI,BSW or Customized
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