标题: ISO 21809-4 Polyethylene coatings (2-layer PE)(英文) [打印本页] 作者: nguyenhung 时间: 2014-5-17 13:22:29 标题: ISO 21809-4 Polyethylene coatings (2-layer PE)(英文)
ISO 21809-4 Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 4: Polyethylene