| 释义 |
氩(氬)yà气体元素,符号Ar(argonium)。无色无臭无味,是大气中含量最多的稀有气体,化学性质很不活泼。放电时发出蓝色的光,在电弧焊接不锈钢、镁、铝等时用作保护气体,也用来填充灯管和灯泡。{argon (Ar); colourless, odourless, inert gaseous element and the most abundant rare gas in the earth's atmosphere, emitting blue light when discharging electricity, used as an inert gas shield in arc welding of stainless steel, magnesium, aluminium, etc., and also for use in electric light bulbs, fluorescent tubes} |