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Chapter 186 : Pull out that guy
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When the coil is energized, a magnetic field is generated, and when a metal enters the magnetic field, it causes a change in the magnetic field. The sensor senses a change in the magnetic field and can sound an alarm.
The metal detector is used to detect the pipeline, and the leaf green does not need to be explored along the line as long as it is confirmed that the root pipe leads to the sea.
The remaining products are the derivative technology products of the magnetic genera ...
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