Discuss technology principle of controlling solder oxide.
论述了其抑制钎料氧化技术机理。
It analyzes the signification t to the management strategy for enterprises and offers six pieces of necessary important principle of controlling logistics cost.
论述了企业的物流成本控制对企业经营战略的重要意义，并在此基础上提出了企业物流成本控制必须遵循的六项重要原则。
This paper studies the establishment of four-mirror circle feedback system and the principle of controlling contrast changes of the image pattern by this system.
本文讨论了建立四反射镜环形反馈系统的有关问题，探讨了利用环形反馈系统控制图象对比度变化的原理。
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