accordion fold是什么意思

用法例句

An anodizing technology was used in anodic oxidation of aluminum alloy, chemical immersion test and drop test were used to test corrosion resistance of the oxide film, and electron probe was used to analyze the oxide film morphology at edges and corners.

对铝合金进行阳极氧化,并进行化学浸泡试验和点滴试验,用电子探针观察棱角部位氧化膜的形貌。

Started with studying on the morphology of LY12 aluminum alloy anodic oxide film at edges and corners and combined with chemical immersion test and drop test, the morphology of oxide film is observed at edges and.

本文主要研究LY12型铝合金的阳极氧化工艺,着重解决在弱酸性燃料电池工作环境中,提高铝合金棱角部位耐蚀性能。

Digital image evaluation method for angularity of coarse aggregates;

粗集料棱角性的图像评价方法

Existing test procedures for coarse angularity are time-consuming and labor-intensive and hard to work in a fast and accurate manner.

基于数字图像处理技术,对粗集料棱角性进行量化研究,以取代传统的试验方法。