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油气管道修复技术
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油气管道修复技术
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油气长输管道安全技术
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oil and gas pipeline repair technology
油气管道修复技术
针对内检测、直接评估、试压检测中发现的缺陷,在6个月内进行缺陷检查和做修复计划表,按规定程序实施油气管道维护修复管理的方法。
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ancient cypress in Guang'an City
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ancient dam of the Yellow River
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ancient drilling in China
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