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1.石油钻机 美国National Supply Co.-Oil well公司和Continental Emsco公司的石油钻机被公认为是世界上最好的钻机,使用寿命为10~15年。 2.钻机动力设备
1. Oil Drilling Rig US National Oil Co. and Continental Emsco’s oil rigs are recognized as the best rigs in the world with a service life of 10 to 15 years. 2. Rig power equipment