性开放的女人AAA片,久久免费看少妇高潮A片小说图片,日韩无套内射视频6,国产99996在线亚洲

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