Brief: The overall structure of the barrel drill is relatively simple compared to other drill tools, but some details and design will have a direct impact on the drilling efficiency.
Brief: The overall structure of the barrel drill is relatively simple compared to other drill tools, but some details and design will have a direct impact on the drilling efficiency.
Brief: The overall structure of the barrel drill is relatively simple compared to other drill tools, but some details and design will have a direct impact on the drilling efficiency.
Brief: The roller drill core barrel is different from other drill tools, it has relatively high requirements on the use method. During core foundations piling , the core barrel roller bits should be lifted from time to time.