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Editorial Office of Petroleum Drilling Techniques
Tel:010-84988317,84988356,84988357;Fax:010-84988289;
E-mail: syzt@vip.163.com
Website:www.syzt.com.cn
Add.: North-Star Times Tower, No.8 Beichendong Road, Chaoyang District, Beijing, China
Post Code: 100101 

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