“突出部”的英语？

隼遍布全球, 营巢于树洞内和悬崖的突出部.Falcons, found worldwide, commonly nest in tree holes or cliff ledges.上述植入件可具有侧面突出部, 诸如侧面销, 以便与组织接合.The implant may have a side projection, such as a side pin, for engaging tissue....