做爰高潮全过程高潮流水,朴智妍被c到高潮下不了床,亚洲无遮挡无码A片在线,香港特级三A毛片免费观看

Dysprosium oxide
Dysprosium oxide
Detail
Uses: used as the raw material for preparing metal dysprosium, glass and neodymium iron boron permanent magnet, and also used in metal halogen lamp, magneto optical memory material, yttrium iron or yttrium aluminum garnet, atomic energy industry. Dysprosium oxide can also be used as additive of NdFeB permanent magnet, add about 2~3% of dysprosium in this magnet, can improve the coercive force, there is not much demand for dysprosium in the past, but with the increasing demand of NdFeB magnets, it becomes necessary to add elements, must be in 95 ~ 99 grade. 9%, the demand is also rapidly increasing. Dysprosium oxide is also used as a raw material for preparing dysprosium metal, glass and neodymium iron boron permanent magnet, and also used in metal halogen lamp, magneto optical memory material, yttrium iron or yttrium aluminum garnet, atomic energy industry. .
Scan QR codeClose