The non-porous refractory liner, - the nest block is a high strength Corundum – Spinel pre-cast and pre-fired shape.
非多孔耐火材料内衬，是一种高强度刚玉- 尖晶石预制和预焙烧的成型的。
2
The anterograde effective refractory period and Wenckebach block point were measured before and after ablation.
进行慢径路改良，观察手术前后房室结的前传有效不应期和文氏阻滞点的改变。
3
In the eastern part of the North China block, the refractory peridotite xenoliths in Cenozoic Hebi basalts (Henan Province) are regarded as the shallow relics of the cratonic mantle;