Traditional instruments including drums, maracas, guitars and turtle shells are used for religious and secular occasions. 传统的乐器包括鼓 、 沙球 、 吉他和海龟壳,用于宗教典礼和日常生活.
高水平的麦角钙化醇对鸡也是有毒害的.Ergocalciferol at high levels also is toxic to chickness.GB14755 -1993 食品添加剂维生素D2 ( 麦角钙化醇 )Food additive -- Vitamin D 2 ( Ergocalciferol )...
The structure, the principle of work, bauxite floatation of BF - L floatation machine were presented.本文介绍了BF -L 型浮选机的结构特点, 工作原理及铝土矿选矿的适应性研究.The seven leading bauxite exporters formed the International Bauxite Association...