Because the drilling is a systems engineering, the need to take the safety management of form a complete set technology and the safety of the drilling operation and management.
因为钻井是一个系统工程，需要采取配套的安全管理技术手段并以及钻井作业的安全管理。
The three systems restrict one another and promote one another so as to form a complete usage system of town's land.
三者互相制约 ，互相促进 ，共同构成城镇土地使用制度的完整制度结构。
The three systems restrict one another and promote one another so as to form a complete usage system of town's land.
三者互相制约 ，互相促进 ，共同构成城镇土地使用制度的完整制度结构。
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