UPN
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Ọwa Igwe Carbon Na-ekpo Ọkụ Dị Mma nke Na-ekpo Ọkụ U Beam C Channel Steel Black Iron Upn Channel
Tebụl dị ugbu a na-anọchite anya ọkọlọtọ EuropeỌwa U (UPN, UNP),
Nkọwapụta, ihe onwunwe, na nha nke ogwe UPN, nke e mepụtara dịka ụkpụrụ ndị a si dị:
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DIN 1026-1:2000
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NF A 45-202:1986
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EN 10279:2000- Ndozi
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EN 10163-3:2004– Ọnọdụ elu, Klas C, Klas nke 1
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STN 42 5550
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ČTN 42 5550
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TDP: STN 42 0135
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