vitrified tube resistor

例句：

1. 1.The surface of the glass is vitrified and smooth.
   这个玻璃的表面是硬化的并且光滑。
2. 2.The glass was vitrified by intense heat.
   玻璃被强烈的热量硬化了。
3. 3.The glassware has a vitrified appearance.
   这个玻璃器皿有着玻璃化的样子。