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Influence factors of rotary speed
Influence factors of flushing water
Influence factors of drilling pressure

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Changsha Drilling Machinery CO., LTD

159# Li Xiang East Road, Changsha, Hunan, China. Post Code 410100

Tel: 0086-731-84077805.

Fax: 0086-731-84072772

Cell/whatsapp/wechat: 0086-13808464920

Email: csdrillingtools@vip.126.com

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