1, i-butt welding flange annealing iqondo lobushushu ukuya kubushushu obuchaziweyo, i-butt welding flange yonyango ithathwa njengesisombululo sobushushu, oko kukuthi, abantu badla ngokubizwa ngokuba yi-"annealing", uluhlu lobushushu yi-1040 ~ 1120 ℃. Unokujonga kwakhona kwi-observa yesithando somlilo...
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