UPN
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Zoo Zoo Kub Dov Carbon U Beam C Channel Hlau Dub Hlau Upn Channel
Lub rooj tam sim no sawv cev rau tus qauv EuropeanU (UPN, UNP) cov channel,
Cov lus qhia, cov khoom, thiab qhov ntev ntawm UPN beams, tsim tawm raws li cov qauv hauv qab no:
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DIN 1026-1:2000
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NF A 45-202:1986
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EN 10279:2000- Kev kam rau siab
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EN 10163-3:2004– Qhov chaw nto, Chav Kawm C, Chav Kawm Qis 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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