求翻译：带防腐层的Φ273 ×10钢管上NO.1，NO.2测点的人工磁化磁异常垂直分量的平均值分量为3459nT，两测点的值差为421nT，约为平均值的7%。是什么意思？

With anti-corrosion layer Φ273 × 10 steel on the NO.1, NO.2 measuring point of artificial magnetization component perpendicular to the average magnetic anomaly component of 3459nT, two measuring points of the value difference of 421nT, about 7% of the average.

With corrosion protective layer on the Φ 273 x 10 steel pipe NO NO .2 .1 points, the artificial magnetized magnetic anomaly vertical weight for the average weight of 3459 nT value difference, the two points to 421, which is about average nT, 7 per cent.

The belt anticorrosion level φ273 ×10 on the steel pipe the NO.1, NO.2 measuring point artificial magnetization magnetism exceptionally vertical component mean value component is 3459nT, two measuring point value difference are 421nT, approximately for mean value 7%.

Φ 273x10 tube with coating NO.1,NO.2 artificial magnetic susceptibility and magnetic anomaly of point average component of the vertical component is 3459nT, the two-point value is 421nT, 7% of the about average.