external corrosion meaning in Chinese

外壁腐蚀
外部腐蚀

Check regularly that there is no external corrosion
定期检查以确定无外部腐蚀。
Pipeline external corrosion direct assessment methodology
管道外部腐蚀的直接评估方法
External corrosion protection systems for steel underground storage tanks
钢制地下储罐外表面防腐蚀系统
External corrosion protection of underground steel storage tanks ; requirements and testing
地下存储容器的防腐蚀.要求，检验
External corrosion protection of buried pipes ; corrosion protection systems for steel pipes
地下敷设的管道的外层防腐.钢管的防腐措施

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