亚洲国产精品无码AAA片,aaaa性bbbb欧美,久久精品国产中国久久,欧洲大肥女bbw

Yttrium oxide

Yttrium oxide

Properties: white powder

Melting point: 2410 ℃

Solution: insoluble in water and base, soluble in acids

Function: iron and steel and nonferrous alloy additives; Applied to fluorescent materials; Various ceramic additives; High temperature protective coating.


在線客服
聯(lián)系方式

熱線電話

二維碼
在線留言