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ISO 21809-1 2018 Petroleum and natural gas industries External coatings for buried or submerged pipelines used in pipeline transportation systems Part 1 Polyolefin coatings (3-layer PE and 3-layer P
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ISO 21809-1 2018 Petroleum and natural gas industries External coatings for buried or submerged pipelines used in pipeline transportation systems Part 1 Polyolefin coatings (3-layer PE and 3-layer P
