welding procedure qualification standard
welding procedure qualification standard
焊接工艺评定标准
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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A deep discussion on welding procedure qualification standard was made in this article, and some suggestion were put forward.
文章对焊接工艺评定标准进行了深入探讨，提出一些建议。
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