It proves that the controlling system designed by this paper is a more perfect system using in the DC servo motor controlling field.

本文设计的控制系统是一套较为理想的直流伺服电动机控制系统。

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Meanwhile, heavy metal waste water which is the current outstanding problem in the field of water pollution, becomes the focus of research in the controlling field.

与此同时，重金属废水是当前水污染的突出问题，控制重金属废水排放成为当前研究重点。

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Taking the full advantages of a design and research institute in technical innovation and new technology application, HCECE is active in R&D of new products in the automatic controlling field.

华辰电控在技术创新和新技术应用上充分发挥设计研究院的优势，积极研究自动化方面的新课题，开发新产品。

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Even if Germany believed it would be in Moscow by late fall, controlling the countryside in W. Russia would have required soldiers to remain in the field and conduct operations.

FORBES: What Were The Biggest Strategic Mistakes The Germans Made During World War II?