试题与答案

管道焊接以前，焊缝两侧10mm范围内，应除去（）、（）、（）、泥垢等直到露出金属光泽

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题型：填空题

题目：

管道焊接以前，焊缝两侧10mm范围内，应除去（）、（）、（）、泥垢等直到露出金属光泽为止。

答案：

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参考答案：B

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