阀门锻钢件超声波检测底波降低量等级分类_阀门标准-资讯动态-网站名称

阀门锻钢件超声波检测底波降低量等级分类_阀门标准

阀门锻钢件超声波检测底波降低量等级分类

等级	1	2	3	4
底波降低量BG/BF	≤8	＞8～14	＞14～20	＞20

文章来源：中国泵阀网

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