Stone body thickness can be use as the cornerstone of the lower, rich stone surface mechanism, pointing significantly as intermediate materials, end natural head flat thin as peak shape.
石体宽厚可作为下层基石，石体表面机理丰富、勾缝明显作为中层材料、端头自然扁薄者作为顶峰造型使用。
The plane body presents a tubular shape or a flat hollow ribbon, one end of the elastic ribbon is arranged inside the plane body to be connected with the plane body, and the other end is a free end.
机身呈管状或扁平空心带状，橡筋一端设置在机身内并与机身相接，其另一端为自由端。
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