Lead oxide in the glass envelope of Black Light Blue lamps.
布莱克蓝灯
A system of electrodes arranged in an evacuated glass or metal envelope.
在玻璃管或金属封套内的电极系统。
Thermal Balance Test and Evaluation of Annealing Furnace for Glass Envelope of Kinescope
显像管玻壳退火炉热平衡测试及评估
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