. Official proceedings . Figure 20. Figure 20 shows a radial drill which has met with a seriousaccident. The cast iron casting supporting the arm was brokenin three -parts. This casting was removed and welded with thecarbon electrode. Electric Welding. 239. Figure 21. Figure 21 shows the casting welded and the drill ready forservice. A high grade piece of cast iron was used in makingthis weld.

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