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按焊缝质量检验标准，对外观缺陷及内部探伤都要检验的是二级和（）级焊缝。
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按焊缝质量检验标准，对外观缺陷及内部探伤都要检验的是二级和（）级焊缝。
时间：2022-02-26 19:32
关键词：
钢结构设计原理
机械工程
大学试题
工学
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一
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焊缝系数为1或设计（标准）要求对焊缝内部进行100%无损探伤检验的，焊缝外观质量（）级合格；设计（标准）要求对焊缝内部进行局部无损探伤检验的，焊缝外观质量（）级合格。
钢结构的焊缝质量检验和质量标准分为三级，以下哪些做法是正确的？Ⅰ．一级焊缝的检验项目包括外观检查、超声波检验和X射线检验Ⅱ．二级焊缝的检验项目包括外观检查和X射线检验Ⅲ．三级焊缝的检验项目是对全部焊缝作外观检查Ⅳ．对动力和疲劳性能要求较高的焊缝，应采用不低于二级焊缝（）
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三级对接焊缝应按二级焊缝标准进行外观质量检验。
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Shutdown price（or point，or rule） 停业价格（或停业点、停业原则）
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