Draft Document - Petroleum, petrochemical and natural gas industries - Prevention of corrosion on pipeline systems influenced by stray currents (ISO 21857:2021); German and English version prEN ISO 21857:2021
文件草案——石油、石化和天然气工业——杂散电流影响的管道系统防腐(ISO 21857-2021);德文和英文版本prEN ISO 21857:2021