以优质的低碳钢为基体，表面烧结锡青铜合金，经过多次烧结轧制而成。
It is made of high quality low-carbon steel, and rolled copper alloy as its surface.
加载后金瓷冠表面均出现表浅裂纹密集等变化，尤其多次烧结组变化更明显。
After loading, the surface of metal-ceramic crowns displayed many shallow cracks, especially obvious after repeated firing crowns.
该炉采用先进的煤气化涡流燃烧正反烧结合，多次配风等先进技术。
The furnace uses the advanced gasification Vortex combustion Combined with positive and negative combustion, many times with the wind, and other advanced technologies.
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