... gas mechanics 气体力学 gas metal arc气体保金属极电弧 gas metal-arc welding 气体保金属极电弧焊 ...
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?气体保
...气体保 gas arc welding; gas electric welding; gas matal-arc welding; gas metal arc; gas metal-arc welding; gas shielded arc welding; gas shielded welding; gas shielder arc welding; gas-shielded-type elec...