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The halides of MnCl _ 2, CdCl _ 2 , ZnF _ 2 and NaF reduce weld penetration as well as width.
卤化物MnCl_2, CdCl_ 2,ZnF_2, NaF都 使熔深减小的同时也减小熔宽.
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A type of cold sealing solution composed of NaF.
本文介绍了研制成功的冷封闭方法.
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