1. 曲折回纹：key parameter == 主要参数 | key pattern == 曲折回纹 | key personnel == 主要人员

2. 万字饰：? isolated pattern:大花纹 | ? key pattern:万字饰 | ? knit-and-float design:编织-浮点花纹

noun

1. an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)

e.g. there was a simple fret at the top of the walls

Synonym: fretGreek fretGreek key