glass envelope

基本解释

Lead oxide in the glass envelope of Black Light Blue (BLB) lamps.
黑蓝灯（BLB）玻璃封装中的氧化铅；
Much energy must be consumed by an atrium due to its glass envelope of a large area.
中庭具有大面积的玻璃围护结构，因而耗能较大。
The oxygen released from the quartz glass envelope changes the color of the gas under high frequency spark discharge from indigo into green.
石英玻璃释放出的氧气使管内气体的高频火花放电颜色由紫蓝色变为绿色。