短語詞組短語bismuth -germanate glass and fiber 鉍鍺酸鹽玻璃及光纖bismuth germanate crystal 鍺酸鉍晶體copper doped bismuth germanate 摻銅鍺酸鉍bismuth silicate -germanate crystal 硅鍺酸鉍晶體 返回 bismuth germanate