open arc welding 明弧焊 ; 明弧焊接 ; 明弧烧焊
open arc lamp 敞式弧光灯 ; 开敞弧光灯
open arc furnace 开弧炉
open-arc furnace [冶] 明弧炉
open-arc welding 明弧焊
open arc surfacing welding 明弧堆焊
open carbon arc lamp 室外碳极弧灯
open-circuit arc 断路电弧 ; 开路电弧
open-top arc furnace 顶部敞口电弧炉
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