亚洲—本道 在线无码AV发,内射老妇女BBWXOX,欧美精品一区二区三区A片,无码人妻丰满熟妇区五十路百度

Rare sagger

稀土匣缽  稀土匣缽

Rare sagger Description:
Rare calcining with sagger is a combination of cordierite and mullite both materials advantages: improved load softening point of cordierite, mullite enhanced thermal shock stability, and in the use of lithium and rare earth compound by adding modified agent, effectively improve the life in the safe use of ≤ 1350 ℃, high temperature, good thermal shock resistance, low coefficient of expansion, a better high-temperature creep resistance and other characteristics, widely used in electronic components, magnetic materials and a variety of ceramic powder sintering.