本文先指出了非接触法测流量的优越性，再基于各种物理原理，叙述了封闭管道流量的几种非接触测量方法与特点。
The advantages. methods and their properties of the non-contact flow measurement for closed pipelines on the basis of some physical principles are described in this paper.
目的研究接触法经内镜氩离子凝固术(APC)治疗隆起糜烂性胃炎的疗效、效率及安全性。
Objective To evaluate the efficacy and safety of contact endoscopic argon plasma coagulation (APC) for treating protuberant erosive gastritis.
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