炭弧; 炭精电弧
1. 碳弧：carbon 碳 | carbon arc 碳弧 | carbon black 炭黑
2. 碳弧光灯：carbide alloy 硬质合金 | carbon arc 碳弧光灯 | carbon arc lamp 碳弧灯,碳精灯
3. 碳极电弧：carbon 碳 | carbon arc 碳极电弧 | carbon arc cutting 炭极弧割
4. 碳电弧：carbon activity 碳素活度 | carbon arc 碳电弧 | carbon arc welding 碳弧焊