| 1. | Check regularly that there is no external corrosion
定期检查以确定无外部腐蚀。 |
| 2. | Pipeline external corrosion direct assessment methodology
管道外部腐蚀的直接评估方法 |
| 3. | External corrosion protection systems for steel underground storage tanks
钢制地下储罐外表面防腐蚀系统 |
| 4. | 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 |
| 5. | 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 |
| 6. | External corrosion protection of buried valves ; heavy - duty thermoset plastics coatings
埋设管件的外部防腐处理.第2部分:加厚式热固性塑料涂 |
| 7. | External corrosion protection of buried pipes ; corrosion protection systems for ductile iron pipes
掩埋管道的外部防腐.球墨铸铁管的防腐蚀系统 |
| 8. | Technical specification for control of external corrosion on underground gas pipeline of steel in area of cities and towns
城镇燃气埋地钢质管道腐蚀控制技术规程 |
| 9. | As usually mild steel is chosen to be the material of pipelines , the external corrosion of steel becomes one important problem of influencing the reliability and the lifetime of buried pipeline system
管材大多选用低碳钢，影响埋地钢质管道可靠性和使用寿命的关键因素是管道金属的腐蚀。 |
