The utilization of pneumatic DTH hammer drilling is the most efficient approach to rescue miners. The previous DTH hammer's impact model was simplified and the analysis of impact parameters was incomplete, hi.
[pdf] The HD55 uses the same frame as its heavier-duty stable mate, the HD77, and provides the ideal balance of power, features and portability for lighter commercial applications where maximum portability and a greater depth range are needed at an affordable price.
[pdf] G 30-45 and G 55-75, Atlas Copco brings the power and durability of an industrial screw compressor to any type of small or medium sized industry. Rugged screw compressor technology for a 100% continuous duty cycle.
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