lug
Verb 拖, 拉
Noun 一拖, 一拉, 耳朵, 耳状物, 装腔作势, 勒索

and a lug boss and a groove which are matched with each other are arranged on two lateral surfaces between the two adjacent lining boards.
相邻两衬板之间的两侧面上设置有相互配合的凸台和凹槽。;