附接在各个制动蹄上的弹簧也将制动蹄拉回原位，不与鼓轮接触。
A spring attached to each brake shoe returns it also to its original position, free of the brake drum.
当拖动本清扫车时，清扫轮鼓上的清扫刷反方向转动，将垃圾扫入垃圾斗。
A towed sweeper for the street in city is disclosed. The sweeping brushes on the sweeping drum are reversely rotating to sweep the garbage into garbage bucket.
应用推荐