They are fingerlike holes caused by internal corrosion and distributed irregularly.

取样解剖后发现,穿孔多为手指状的直孔,几乎都由内壁点腐蚀引起.

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A pig is a equipment for pipeline internal corrosion detection.

介绍了国内外管道内腐蚀检测技术的发展状况.

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The evaluation of internal corrosion degree is the key link of corrosion prevention of gas pipeline.

天然气管道内腐蚀的评价是管道腐蚀与防护工作中重要环节.

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Where internal corrosion is known to exist, the following practices can be employed.

在发现有内部磨损的部位, 可以采取以下措施.

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