ISO 21809-1-2018
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Petroleum and natural gasindustries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 1: Polyolefin coatings (3-layer PE and 3-layer PP)
石油和天然氣工業(yè) - 管道輸送系統(tǒng)中使用的埋地或水下管道的外部涂層第1部分:聚烯烴涂層(3層PE和3層PP)
