Replacing diesel by diesel-natural gas as the fuel for drilling engine unit in natural gas field is one of the effective ways for improving economic benefit and reducing development cost.

天然气气田钻井发动机机组燃料由柴油改为柴油-天然气双燃料，是提高经济效益、降低开发成本的有效途径之一。

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The hydraulic drilling machine with computer control technology, the pump and engine matching control to realize the intelligent, not only power is stronger, and more fuel-efficient.

这些液压钻机借助了计算机控制技术，泵与发动机的匹配控制实现智能化，不但功率更强，而且更加省油。

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The reeling out of the drilling line is powered by gravity and reeling in by an electric motor or diesel engine.

松开钢丝绳是依靠重力的作用，而缠绕钢丝绳则是借助于电马达或柴油机。

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From engine overhauls, to drilling out rivets to fixing faulty flaps, Boeing and Airbus-made passenger jet repairs are increasingly being done in third-world countries.

FORBES: JetBlue Good For A Climb To $7