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The density logger consists of a radiation source.
密度测井仪包括辐射源。
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The radiation effect of high density polyethylene films in the air was studied.
本文研究了空气中高密度聚乙烯薄膜的辐射效应。
youdao
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The radiation effect of high density polyethylene films in the air was studied.
本文研究了空气中高密度聚乙烯薄膜的辐射效应。
youdao