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Dab tsi yog qhov txawv ntawm I-beams thiab H-beams?
Dab tsi yog qhov txawv ntawm I-beams thiab H-beams?
Ti 06, 2023

1.Dab tsi yog qhov txawv ntawm I-beam thiab H-beam?
(1) Nws kuj tseem tuaj yeem paub qhov txawv ntawm nws cov duab. Tus ntoo khaub lig ntawm I-nqaj yog "工", thaum hla ntu ntawm H-beam zoo ib yam li tsab ntawv "H".
(2) Vim lub thickness me me ntawm I-beam ...

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