chapter 92 The stone gate opens ===

Briar also wore a gas mask. She stepped forward, observed carefully for a while, and then took out an instrument from her backpack. "This is a magnetic field sensor that can perfectly detect changes in the surrounding magnetic field." Song Yi explained with a smile. It seems that he admires Briar, a junior. Briar walked around the stone gate a few times, observing the values ​​on the detector, and fell into deep thought. Chu Zheng said: "Have you found a way to crack it? If not,...