1. 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,并启用水斗式水轮机新铭牌。
2. 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.
   从而对脆性材料抗拉强度的测定提出了一种新的方法,即通过对圆盘沿直径对心受压试验可测出其抗拉强度。

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