Ndi - mtengo
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Mitengo yamtengo wapatali ya I-beam ASTM yotentha ya carbon steel I-beam
I-beam, yomwe imadziwikanso kuti chitsulo, ndi chitsulo chokhala ndi gawo lopangidwa ndi I.I-beam imagawidwa kukhala I-beam yotentha komanso yopepuka I-mtengo.Ndi gawo lachitsulo lomwe lili ndi gawo lofanana ndi I.
