helium group gas
常见例句
- In a rocket as defined in claim 1, wherein said gas comprises a gas selected from the group consisting of nitrogen, helium and air.
在火箭所界定的索赔1 ，其中表示，天然气气体组成选自组成的氮，氦和空气。
www.tech-domain.com - Noble gas( or inert gas ):Any of the six chemical elements that make up the rightmost group of the periodic table as usually arranged: helium, neon, argon, krypton, xenon, and radon.
稀有气体（亦称惰性气体）：通常排列在周期律中最右边一族的六种化学元素：氦、氖、氩、氪、氙和氡。 返回 helium group gas