Noise Barrier, tseem hu ua acoustic phab ntsa / suab barriers.Feem ntau yog siv rau kev sib cais suab nrov thiab txo txoj kev loj, subway, + kev nthuav dav, railway, elevated composite txoj kev thiab lwm yam suab nrov.Nws tuaj yeem muab faib ua hom kev cuam tshuam lub suab thaiv ntawm lub suab ntshiab, thiab qhov sib xyaw ua ke s ...
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