open-work

open-work
n [U] pattern (in metal, lace, etc) with spaces between threads or strips （金属, 饰边等）透雕细工, 网状细工
    [attrib 作定语]
open-work lace 网眼饰边
    open-work wrought iron 透雕细工锻铁.

牛津英汉双解词典