1. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere. 
   无色无味的惰性气体，六种惰性气体之一，构成地球大气约百分之一的部分。
2. A compressed inert gas, such as a fluorocarbon, that acts as a vehicle for discharging the contents of an aerosol container. 
   压缩气体被压缩的惰性气体，比如碳氟化合物，这种气体充当喷撒器中物质的载体
3. a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues. 
   一种常见的非金属元素，通常为无色无嗅无味的惰性二原子气体，体积占大气的%，活细胞的组成成分。
4. a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas). 
   一种极轻的无色元素，六种惰性气体之一，最难液化，在天然气中有较为经济的可提取量。
5. vacuum and inert atmosphere rolling 
   真空和保护气体中轧制

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• 2. 钝气
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• 3. 惰性气
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• 4. 厂务供气系统中何谓
  厂务供气系统中何谓inert gas?...答：inert gas 为一些特殊无强烈毒性的气体, 如 NH3, CF4, CHF3, SF6 等.
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