Glass shell made of a light bulb to keep the filament in a vacuum, or inert gas under low pressure, role is to prevent oxidation of the filament at high temperature under.
电灯泡外壳用玻璃制成，把灯丝保持在真空，或低压的惰性气体之下，作用是防止灯丝在高温之下氧化。
The results showed that rupturing and exfoliating of the oxidation layers under the high-temperature high-pressure water vapor were induced by the non-breakthrough lengthwise cracks;
结果表明：T91钢在高温高压水蒸汽环境下氧化层遵循“ 纵向裂纹不穿透破裂剥落”机理；
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