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製品名: DIN 17172の等級StE 210-7の炭素鋼の継ぎ目が無い管は別名穏やかな鋼管および管です DIN 17172の等級StE 210-7の炭素鋼の継ぎ目が無い管はEn 10204のタイプ3.1/3.2に従って製造所の検定証と証明されます。3.2がTUV、DNV、BVQS、LLOYDS及...