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研究一种确定旧管道阴极保护电流密度的新方法。现场试验结果表明，运用该方法确定旧管道阴极保护电流密度是准确实用的。
A new method of determining the cathodic protection current density of old pipes was studied. Field test results show that using this method to determine the cathodic protection current density of the old pipe is accurate and practical.