保护气体是指焊接过程中用于保护金属熔滴、熔池及焊缝区的气体，它使高温金属免受外界气体的侵害。
n. blanket gas
misc. protective gas ; shielding gas
在密封熔炼炉含0.01%HFC134a的 关键字: 镁合金; 密封炉; 保护气体; 表面膜[gap=1547]Key words: magnesium alloy; sealed furnace; protective gas; surface film
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焊接级保护气体 welding grade gas ; welding grade shield gas
保护气体焊 inert gas shielded arc welding
保护气体钎焊 CAB ; controlled atmosphere-brazing
焊接用保护气体 Protective gases for welding ; shielding gas for welding
焊接保护气体 Welding Gases
保护气体流量 shield gas flow rate
保护气体电阻炉 electric artificial atmosphere furnace
保护气体气路系统 shielded gas line system
气体保护焊 GMAW ; gas shielded welding ; MAG ; gas shielded arc welding
保护气系统：从保护气体发生站至还原退火炉的管道。
Protective gas system: pipe line from the protective gas generation station to reducing annealing furnace.
焊接工艺评定记录单上应包括封底焊时所用的惰性保护气体组成成分和流率。
The PQR shall include the composition and flow rate of the shielding and inert gas backing, when used.
本文研究了锌对镀锌板激光焊接性影响，以及不同保护气体对镀锌板焊接性的影响。
This paper studies the effect of zinc and shielding gas type on Laser weldability of zinc-coated steels.
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