outer cover的用法和樣例：
例句
- The invention can conveniently dilate the outer tyre by matching the first pulling buckle with the second pulling buckle.
本發明通過第一拉扣與第二拉扣的配合，可以很方便地對輪胎外胎進行擴張。 - The invention discloses an outer tyre dilator of a tyre, and solves the dilatation problem of the outer tyre.
本發明公開了一種輪胎外胎擴張器，解決輪胎外胎擴張問題。
