English translation: protective atmosphere, controlled atmosphere
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Explanation: The steel is tempered (hardened) in a controlled atmosphere.
Jeff Ganellen Sweden Local time: 13:53 Native speaker of: English PRO pts in pair: 84
Tack så mycket!
9 mins confidence: peer agreement (net): +1
Explanation: verkar det vara
"Plants for heat treatment of steel and non-ferrous metals In controlled atmospheres or without protective gas operatrion Heated by gas or electricity ..." www.aichelin.de/english/produkt.htm
"Waste-gas based control of steel converting
The heat transfer mechanisms between the coil, the protective cover and the protective gas in the mathematical model of COILTEMP is shown in Figure 1. In the ..." www.mefos.se/mefosnews1_97.pdf