The corrosion current and impressed against-corrosion current of a ship modulated by shaft's rotation will generate an extremely low frequency electric field (ELFE) which becomes a kind of important characteristic signal in sea water.
The corrosion current and impressed against-corrosion current of a ship modulated by shaft's rotation will generate an extremely low frequency electric field (ELFE) which becomes a kind of important characteristic signal in sea water.
摘要舰船的腐蚀和防腐电流经螺旋桨转动的调制后在海水中会産生极低频电场，成爲一种重要的特征信号源。