protective atmosphere

常见例句

The deep levels in electron irradiated CZ silicon single crystal grown in pure nitrogen protective atmosphere has been studied.
本文研究了電子輻照在氮保護氣氛中生長的直拉矽單晶中引入的深能級。
The requirements of bright annealing of copper and brass strip on furnace, protective atmosphere and rolling coolant are analysed.
本文就銅及黃銅的光亮退火對退火爐、保護氣氛，軋制潤滑劑的要求作了分析。
The influence of the parameters such as surface treatment state, laser output power, welding speed, protective atmosphere, and pulse frequency on the welding quality was studied.
研究了試件表麪処理狀態、保護氣躰、激光輸出功率、銲接速度、激光脈沖頻率等工藝蓡數對銲接質量的影響槼律。

"This number is a reminder that for the last 150 years — and especially over the last several decades — we have been recklessly polluting the protective sheath of atmosphere that surrounds the Earth and protects the conditions that have fostered the flourishing of our civilization, " Gore said in a statement.
NPR: Greenhouse Gas Milestone; CO2 Levels Set Record