nondestructive means 中文意思是什麼
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Nondestructive inspection on welding seam of tube is required in the tube production, and real time x - ray radiography inspection is an effective means
在鋼管生產過程中需要對焊管焊縫進行無損檢測， x射線實時成象檢測是一種比較有效的檢測手段。
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