Carbon steel Concentric driling system

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{"cid":"131614","pid":"23492122","pimg_url":"\/\/img1.tradegrowthhub.com\/6a\/50\/2ade2e920ffd\/product\/80275496_s-w400xh400.jpg","name":"Water Well 8\" 273mm Concentric Drill Bit For Casing Drilling","attrs":{"Price":"Negotiable","MOQ":"1.0 Sets","Delivery Time":"Negotiable","Brand":"Sinodrills"}}