The copper alloy thick-walled casting acts according to its shape to be possible to divide into the common shape thick-walled casting and the unusual shape thick-walled casting,the former and the latter compare,the foundry technique regularity is strong.
铜合金厚壁铸件,根据其形状可分为常见形状厚壁铸件和异常形状厚壁铸件,前者与后者相比,铸造工艺规律性较强。
The inclusion interaction between KI\-3 and β CD was proved through \+1H NMR and the formation constant was determined through UV/Vis.
研究了室温下β Ｃ Ｄ／ Ｋ Ｉ３ 包合物溶液和固体的稳定性，以及固体的热分解性质，通过１ Ｈ Ｎ Ｍ Ｒ 方法证实了 Ｋ Ｉ３ 与β Ｃ Ｄ 的包结作用，并用 Ｕ Ｖ／ Ｖｉｓ 方法测定了形成常数。