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.

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。

youdao

As for it's non-contact metrology method, it is widely used for testing many physical parameters So phase shifting interferometry plays very important role in high precise optical testing filed.

它采用非接触式的测量手段，广泛的应用于多种物理量的测试，在高精度光学检验测量中占有重要的地位。

youdao

"Advanced imaging technology enhances security by safely screening passengers for metallic and non-metallic threats including weapons, explosives and other objects concealed under layers of clothing without physical contact, " Soule said.

CNN: Body scanners not 'magic technology' against terror