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November 23, 2018
Hejian Deris Petroleum Drilling Equipment Co., Ltd
Address : Junziguan Industry Park, Hejian City, Hebei Province, China
Tel: +86 (0)317 5586567
WhatsApp: +86 15128708428 / WeChat
Email : sales4@hjderis.com
Skype: jenny19871026shen
QQ : 824942002
PDC Bit drilling operations requirement
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