276mm MRS215 Overbuden Concentric Caasing Drilling Under Reaming System Bit For Construction
                                         
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                                            Product name: 276mm MRS215 Overbuden Concentric Caasing Drilling Under Reaming System Bit For Construction Casing pipe OD: 215mm MRS overburden drilling systems are designed for economic cost of drilling in simultaneous casing advancement. The wings are ......                                         
                                        
                                            Wuhan Kingdrilling Diamond Co.,Ltd
                                         
                                        
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