中文字幕乱妇无码av在线,bl道具play珠串震珠强迫,岳的大肥屁熟妇五十路99,国产毛片精品一区二区色欲黄a片

　　應(yīng)用：鋯剛玉具有機(jī)械強(qiáng)度高，熱穩(wěn)定性好，高溫蠕變小，化學(xué)性質(zhì)穩(wěn)定，抗酸堿侵蝕性能好，玻璃窯爐、玻璃纖維爐、垃圾焚燒爐、電熱爐等窯爐的關(guān)鍵部位。

　　Application:Fused alumina zirconia has high mechanical strength, good thermal stability, high temperature creep, chemical stability, resistance to acid and alkali corrosion resistance, the key parts of the glass furnace, glass furnace, waste incineration furnace, electric furnace and kiln.