国产精品无码午夜福利_深夜A级毛片免费视频_精品久久久久久国产_国产欧美一区二区精品性色_天天婬欲婬香婬色婬视频播放,亚洲精品日产精品乱码不

Ytterbium oxide
Ytterbium oxide
Detail
In yttrium oxide, gadolinite, monazite and xenotime minerals. The mass fraction of monazite containing rare earth elements generally reached 50%, ytterbium usually accounted for 0.03%.
Application: used in metallurgical and chemical experiments.
Scan QR codeClose