contrastes

1.The paper contrastes and analysies the marking for the coarse degree ...

本文对新旧表面粗糙度的注进行了对比析。

2.This paper introduces studying and using process of new type polyurethane sealing element,contrastes with similar import sealing element.

介绍了新型聚胺脂密封件的研究开发和用过程,并与进口同密封件进行对比,有一定的实用价值。