φ45-F18 Coal and Rock Drill Bit (Water)-Yikuang Technology

Release time:

2020-09-14

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Key words:

Technology

φ63.5-50.5-5-1200 Geological Alloy Drill Pipe-Yikuang Technology

Coal rock bit-beneficial mining technology

φ63.5-50.5-5-1200 Geological Alloy Drill Pipe-Yikuang Technology

Coal rock bit-beneficial mining technology

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