| 摘要 |
The invention relates to a loosening indica~tor for a nut/bolt (9), which is an indicator device to be installed in connection with the nut/bolt (9). The indicator device includes detector means (31, 31') for detecting the looseni ng of the nut/bolt, transmitter means (30), and power supply means (32) for indi~cating the loosening. The invention also relates to a corresponding system in the indication of loosening.
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