短语词组短語articulation cylinder group 鉸接油缸組件articulation cylinder piston 鉸接油缸活塞articulation cylinder rod 鉸接油缸活塞杆articulation cylinder mounting 鉸接油缸安裝articulation cylinder piston retaining bolt 鉸接油缸活塞固定螺栓 返回 articulation cylinder