API 8.5" three-cone rock-metal seal tci drill bit
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Sales contact:
15922134617 Mr Mao
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Technical director:
13511685966 Mr li
Address:Factory Building 7, No. 158 Zhenxing Road, Fenghuang Industrial Park, Danyang City, Jiangsu Province
Email:Sam.mao@zjherui.com
Email:Sam.mao@zjherui.com