Especially an elongated boss (carved keystone) at the junction of the intersecting ribs of the fan vaulting associated with the English Perpendicularstyle.
尤其是指与英国垂直式风格有关的一种扇形拱顶的交叉拱肋在接合点的拉长浮凸饰（雕刻的楔石）。
2
By the late 14th century, the Perpendicularstyle replaced curvilinear tracery with straight mullions extending to the top of the main arch, connected at intervals by horizontal Bars.
到14世纪末，垂直式风格建筑采用延展至主要拱形顶端的直线棂条来代替曲线花格，中间有横向的棂条相连。
3
From Angle manage, tube the person is a positive pyramid structure, but serve a guest to then pour the pyramid type, become from here from arrive bottom up of perpendicular management style.