垂直管道或设备金属保护层的敷设方法和要求是(  )。A.由下而上施工,接缝上搭下 B.由上而下施工,接缝上搭下 C.由下而上施工,接缝下搭上 ...

作者: rantiku 人气: - 评论: 0
问题 垂直管道或设备金属保护层的敷设方法和要求是(  )。
选项 A.由下而上施工,接缝上搭下 B.由上而下施工,接缝上搭下 C.由下而上施工,接缝下搭上 D.由上而下施工,接缝下搭上
答案 A
解析

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