现场应用表明，根据螺杆泵油井工况宏观控制图，可提高螺杆泵采油系统管理水平及经济效益。
Field application demonstrates that the management level and economic efficiency of the screw pump production system would be improved by using the control chart.
利用控制图对工序进行了有效的现场控制并在实践中取得了明显的改进。
An effective spot-control method with control chart has been made in productive process, and obvious improvements are obtained in practice.
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