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Rock Bolt Installation In A Tunnel 450.00 KB | 0:32 Download |
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Tunnel Rock Bolting 1.13 MB | 1:22 Download |
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Normet Rock Reinforcement Dbolt The Dynamic Rock Bolt 2.14 MB | 2:36 Download |
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Hauling Up Anchor Bolts 450.00 KB | 0:32 Download |
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Sda Rock Bolts Drilling And Installation In Tunnel Construction 435.94 KB | 0:31 Download |
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