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Cai J Williams
February 3, 2012
Cai J Williams
February 1, 2012
Cable Tool Drilling
>
Chisel & Weight
What is it?
The chisel is a strong, hard pointed drill bit designed for breaking hard soils and rocks. It must be strong enough not to break, even after repeated large hits. It must also not wedge itself into the rock.
Used Ideas
Railway Track
Spring Steel Chisel
Stone Hammer
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Railway Track
Spring Steel Chisel
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