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Heavy-Duty HD712 Thread Coupling Drill Shank Adapter for R35, R38, T38, St68, Gt60, T45 Rock Drilling, Find Details and Price about Coupling Drill Shank Adapter Drill Shank Adapters from Heavy-Duty HD712 Thread Coupling Drill Shank Adapter for R35, R38, T38, St68, Gt60, T45 Rock Drilling - HENAN STAROCKDRILL EQUIPMENT CO., LTD