The use of DC electricity is another source of static electric fields, e.g. rail systems using DC, and televisions and computer screens with cathode ray tubes.
使用直流电是产生静电磁场的另一个原因，例如铁路系统使用直流电，电视和计算机屏幕带有阴极放射管。
2
The investigation result shows that the surface temperature of tubes is remarkably reduced due to the static mixed units so that their service life meets the requirement.
结果表明，由于静态混合元件的使用明显降低了炉管表面温度，所以其服役寿命满足要求。
3
Carry out external walk around, check static ports, pitot tubes, tat probe for no damage and obstruction, check static dischargers, radome latches and Angle of attack sensors for no damage.