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Brand Name:Hainaisen Model Number:6-1/2 HS6422TB Place of Origin:China 6-1/2 in 5 Blade PDC Core Bit Oil Gas Well Coal Mining Drilling Machine Diamond drill bit is an important driling tool for both oil and coal mining drilling. It is widely used to explore oil when oil is being extracted. The quality of its working ... |
Shaanxi Hainaisen Petroleum Technology Co.,Ltd
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