lower apex of fold是什么意思

中文翻译褶皱下顶

网络释义

1)lower apex of fold,褶皱下顶2)upper apex of fold,褶皱顶部3)flat-topped fold,平顶褶皱4)tip-line fold,尖顶褶皱5)chevron-style fold,尖顶式褶皱6)inverted decollement,倒转脱顶褶皱