After the coating solidifying, the pipe test should be done with defect detector under the specified voltage.
待涂层固化当前，要应用缺陷检测器在涂料技术标准中规定的电压下对钢管进行检测。
2
The final inspection of the coating, before the pipe is put into trench, being carried out by a holiday detector which applies a high voltage current across the coating.
在管子放入管沟前，利用覆盖层检查仪对管道覆盖层进行最后的检查，它在覆盖层的两侧施加高压电。
3
The article refers to the oil pipe two - dimension leak - magnetic detector firstly.