试题与答案

管道附件使用前必须确认符合国家或主管部颁技术标准的项目有哪些？

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题型：问答题 简答题

题目：

管道附件使用前必须确认符合国家或主管部颁技术标准的项目有哪些？

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C

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