I-beam

Can be used for important parts of buildings such as construction engineering and building roof stru···

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steel angel

Can be used for important parts of buildings such as construction engineering and building roof stru···

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steel angel

Can be used for important parts of buildings such as construction engineering and building roof stru···

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I-beam

Can be used for important parts of buildings such as construction engineering and building roof stru···

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U-channel

Can be used for important parts of buildings such as construction engineering and building roof stru···

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U-channel

Can be used for important parts of buildings such as construction engineering and building roof stru···

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U-channel

Can be used for important parts of buildings such as construction engineering and building roof stru···

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