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Imibhobho ye-weldied kunye engenamthungo
I-Weldid kunye nelingenamthungo-amabakala ohlukeneyo kwi-Aloty Steel, i-carbon yentsimbi, i-stail-nickel, i-dupplex, i-suplex yentsimbi kunye nentsimbi ephantsi kunye ne-stal. Ngokuka-Astm-106, API 5 L, iBanga le-A53 A / B, i-A-333, i-ASTM A-3125, i-1587, i-1580 mm ) Erw, i-LSAW, i-HSAW, i-EFW ngokwe-API 5l, iBanga le-A53 A / B, i-ASTM A671 / BS1387, Din 24 ...
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