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汉语拼音：yán cháng

1.神话传说中的古国名。

1. 神话传说中的古国名。

   《山海经·海内经》：“有 盐长之国 ，有人焉鸟首，名曰 鸟氏 。”

• and the normally used friction modifiers are aliphatic acid ester and its amine salt, and long-chain phosphite ester as well.

  齿轮油中所用摩擦改进剂一般为脂肪酸酯、脂肪酸胺盐、长链亚磷酸酯。

• Encapsulation Study of Persistent Luminescent Pigment of Alkaline Earth Aluminate

  碱土铝酸盐长余辉发光颜料表面包膜的研究

• Synthesis of New Blue Silicate Long Afterglow Phosphors by Combustion and Its Afterglow Properties

  燃烧法合成新型蓝色硅酸盐长余辉材料及其发光性能的研究

• Research Progress in Long Persistent Luminescence Properties and Influencing Factors of Alkali-earth Aluminate Phosphors

  碱土铝酸盐长余辉发光材料发光性能影响因素的研究进展

• Progress in Preparation of Aluminates Long-afterglow Luminescent Materials

  铝酸盐长余辉材料的制备方法进展

• Study on the preparation of green aluminate long afterglow phosphorescent materials used the method of combustion

  一步燃烧法制备铝酸盐长余辉蓄发光材料的研究

• Advances in preparation of ultrafine alkaline earth aluminate long afterglow phosphor

  超细碱土铝酸盐长余辉发光材料制备近期进展

• Study and Application of Earth Alkali Alumino Silicate Based Long Afterglow Luminous Pigments

  碱土铝酸盐长余辉发光颜料的研究与应用

• Study on Surface Modification of Long Afterglow Aluminates by Vinylsilane Coupling Agent

  乙烯基硅烷偶联剂表面改性铝酸盐长余辉发光颜料的研究