Other Mining MachineryChina T51coupling Sleeve R32 R38-55-160 Coupling Sleeve T38 T45 T51 Threaded Pipe Sleeve Type Coupling for Rock Drilling, Find details about China Coupling Sleeve, Adapter from T51coupling Sleeve R32 R38-55-160 Coupling Sleeve T38 T45 T51 Threaded Pipe Sleeve Type Coupling for Rock Drilling