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Explain Jumbo drill.
written 5.3 years ago by
yashshah
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modified 4.0 years ago
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prashantsaini
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written 5.3 years ago by
yashshah
• 140
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- Drill Jumbos used in tunnels are also known as Tunnel jumbos.
- A drill jumbo is portable carriage having one or more carriage having one or more working platform equipped with columns, bars or booms to support and guide the drills, enabling the drills to perform drilling operation at desired pattern. …
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