不ふ活かっ性せいガス

noun

inert gas

Technical term in chemistry for a gas that does not readily react with other substances; includes noble gases and nitrogen in certain contexts.

• 溶よう接せつの際さい、不ふ活かっ性せいガスでシールドする。

  During welding, they shield with an inert gas.

• 不ふ活かっ性せいガス雰ふん囲い気き下かで実じっ験けんを行おこなう。

  Conduct the experiment under an inert gas atmosphere.