arc

• Recommended practices for gas - tungsten - arc welding
  钨电极惰性气体保护焊的推荐规范
• Research on shaft of gear pump repaired by arc - sprayed 3cr
  13修复齿轮泵轴试验研究
• Mum : yes . it ' s an arc of different colors
  妈妈：是的。就是一个有不同颜色的弓形。
• The first figure is an arc followed by a line
  第一个图形是一段弧，后跟一条直线。
• Voltage reducing devices for ac arc welding machines
  交流电弧焊机的自动降电压装置
• Joan of arc was burnt ( alive ) at the stake
  圣女贞德在火刑柱上被（活活）烧死
• Arc welding equipment - part 1 : welding power sources
  弧焊设备第1部分：焊接电源
• Mid - pressure vane motor with arc push rod for ship
  船用中压圆弧顶杆式叶片马达
• Arc welding equipment - part 5 : wire feeders
  弧焊设备安全要求第5部分：送丝装置