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Question:

Is the railway sound barrier and the protective screen a thing?

Is the railway sound barrier and the protective screen a thing?

Answer:

Sound barrier and sound insulation wall is a kind of thing that is environmental noiseproof noise reduction
Sound barrier and sound insulation wall is a kind of thing that is environmental noiseproof noise reduction And the protective screen is anti-X-ray radiation and the like is not a thing
And the protective screen is anti-X-ray radiation and the like is not a thing

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