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.