fast joint butt 固杆铰链

loose joint butt 可折铰链

Butt joint 对接 ; [机] 对接接头 ; 对接榫

loose-joint butt 可拆铰链 ; 活铰链

butt mitred joint 对接角榫

butt welded joint 对焊连接 ; 对接焊节点 ; 对焊接头

butt welding joint 对接接头

lock butt joint 锁底对接接头

double U butt joint 带钝边U形对接接头

square butt joint [木] 平头对接 ; 平对接 ; 平头对接接头