PageList(intensity):
...and intensity에 존재하는 pages:
자기장세기,magnetic_field_intensity - 자기장세기,magnetic_field_intensity
전기장세기,electric_field_intensity - 전기장세기,electric_field_intensity
...and intensity에 존재하는 pages:
자기장세기,magnetic_field_intensity - 자기장세기,magnetic_field_intensity
전기장세기,electric_field_intensity - 전기장세기,electric_field_intensity