Assertion: tourmaline's electrode | /r/HasProperty | removed
Facets:
Source sentences:
text: Even after the electrodes are removed, the surfaces that have been in contact with the electrodes remain electrified in a positive and negative polarity and the electret maintains the electrification for a long time.
text: Even after the electrodes are removed, the surfaces that have been in contact with the electrodes remain electrified in a positive and negative polarity and the electret maintains the electrification for a long time.
text: Even after the electrodes are removed, the surfaces that have been in contact with the electrodes remain electrified in a positive and negative polarity and the electret maintains the electrification for a long time.