短语词组短语undercut profile 钻蚀断面图;切口型undercut weld 底切焊接undercut slot 梯形割缝Undercut Handing 底部切削处理Undercut Competition 这个选项undercut price [贸易]削价;压低价格undercut ball 下切球Undercut Depth 倒凹深度to undercut 使打折扣 返回 undercut