It is suggested that the specific speed would be replaced by diametric ratio,and the new nameplate would be used.

建议比转速应为直径比所取代,水斗式水轮机新铭牌。

Therefore we point out a new method of testing fragile material's strength of extension.That is to say we can measure the disk's strength of extension by pressing in its diametric.

从而对性材料抗拉强度的测定提出新的方法,即通过对圆盘沿直径对心受压试验可测出其抗拉强度。