We can imagine that a lump of wet clay somehow ended up in the fire, dried out, hardened and formed a hollow shape; a shape that could hold things, in a tough material.
The reformed one has made up for the defect that go down material slot holdup stuff easily, and avoid serious wear and tear.
提出了相应的改造方案，通过改造消除了下料溜槽易粘料的缺陷，避免了对筒体磨损严重的现象。
3
You may hold the glider during start up time but you are not allowed to touch the glider with any part of your body or material before passing the red line.