Ọpa irin ti o bajẹ jẹ awọn ọpa irin ribbed dada, ti a tun mọ si awọn ọpa irin ribbed, nigbagbogbo pẹlu awọn igun gigun gigun meji ati awọn iha ifa boṣeyẹ pin pin pẹlu itọsọna gigun.Apẹrẹ ti iha ifa jẹ ajija, egugun egugun ati oṣupa, irin dabaru irin jẹ irin pataki fun ile awọn paati loke iwọn alabọde, ati China ni iwọn didun okeere kan ni gbogbo ọdun.