Special, rapidly solidifying insulating foam is injected into specific locations inside the bomb using high pressure.

A solid envelope quickly forms around the float, fixing it in place and preventing it from moving the trigger contact.

At the same time, the foam can also wrap around the frozen core components of the level.

Make it permanently disabled!

"But isn't that very risky?"

The students expressed their concerns, "The pressure during injection, the direction of foam flow, and the speed of solidification, etc."

Even the slightest mistake could cause the float to move.

Or, before the foam solidifies, the buoyancy switch experiences uncontrollable displacement…

"Of course there are risks!"

Lu Guotao did not deny it:

"But in situations where liquid disruption is not possible, and it is necessary to disable both the level and the buoyancy switch as quickly as possible."

Rapid-curing insulating foam is already a relatively feasible method.

If the operation is precise, the success rate is relatively high.

As the two were discussing, Shen Ting slowly retracted the endoscope in the live stream.

He stood there, silent for a moment, then looked at Zhao Gang, the crew-cut armed policeman beside him, and whispered something.

Zhao Gang nodded solemnly and immediately turned around.

Several palm-sized metal cans were taken out from a special sealed box.

And a mixing gun connected to a slender, flexible conduit and a precision nozzle.

Lu Guotao recognized those things at a glance—

High-voltage rapid-setting insulating foam generator!

Dedicated mixing and injection equipment.

Clearly, Shen Ting's choice was exactly the same as the plan he had just anticipated!

Great minds think alike!

The students nearby exclaimed in surprise.

Lu Guotao remained silent, only staring intently at Shen Ting's movements.

"Shen Ting is indeed not a novice at bomb disposal."

They have a wealth of bomb disposal experience.

Now, let's see what he does..."

Shen Ting took the mixing gun and checked the airtightness of each connection.

Then he instructed Xu Xinyi to adjust the liquid nitrogen spray position, focusing it on the outer area corresponding to the mercury cavity.

He then slowly and very steadily inserted the specially made nozzle, which was not much thicker than a human hair, into the bomb through the operating hole in the sandwich shell.

Beside it, the screen of the X-ray imager was adjusted to the optimal viewing angle.

Although the specific shape of the foam cannot be shown, the distribution of the injected material and the relative positions of the internal structures can be roughly shown.

Shen Ting's gaze was fixed on the imaging screen, his fingers making extremely subtle adjustments to the depth and angle of the nozzle.

Even through the screen, Lu Guotao seemed to feel the invisible pressure and tension.

The success or failure hinges on the injection of rapid-curing insulating foam.

As for Shen Ting, it seems that he has finally determined his final position.

His fingers steadily pressed the activation button on the hybrid gun.

"laugh--"

A faint, almost inaudible sound, the sound of a mixture of gas and liquid being ejected, rang out on the screen.

In the live broadcast, Zhao Gang, Chen Hao, and Xu Xinyi, who were standing next to the bomb, all trembled almost imperceptibly.

Clearly, all three of them were very nervous.

Next came the sound of rapid-setting mixed foam being continuously injected.

Lu Guotao stared intently at the tablet screen.

One second, two seconds, three seconds...

Shen Ting maintained the pressing posture for more than ten seconds.

Then, very slowly, he released his finger and carefully withdrew the nozzle of the mixing gun from the small hole.

He looked at the countdown above the bomb.

05:24:48

05:24:47……

It's beating steadily now!

Xu Xinyi, who was in charge of spraying liquid nitrogen, also closed the valve of the liquid nitrogen spray tank after being reminded by Shen Ting.

The continuous hissing sound finally stopped.

"It seems to have worked out."

Seeing this, Lu Guotao breathed a long sigh of relief and a smile appeared on his face.

Since there is no need to spray liquid nitrogen anymore, it means that the level has been fixed by the solidified foam.

Even after a long time had passed since the quick-setting insulating foam was sprayed in, the bomb showed no reaction.

This demonstrates that the foam effectively encapsulates the float of the buoyancy switch.

Both have now been effectively deactivated.

"Team Leader Shen, you don't look that old, but you're surprisingly steady."

Lu Guotao's expression changed completely as he watched Shen Ting on the live stream.

It's no longer just admiring their courage, but now it comes with genuine recognition.

"Teacher, shouldn't Team Leader Shen deal with those complex circuits and trick switches next?"

If it were you, what would you do next?

Lu Guotao's students, equally amazed, asked questions.

"That's hard to say!"

Lu Guotao frowned slightly and pondered for a moment before saying:

"It involves selecting the conventional method of tracing the circuit, identifying true and false loops, and then precisely cutting the wires."

Alternatively, unconventional methods may be employed, such as localized circuit freezing, microwave interference, or even complete shielding and relocation...

This depends on the specific layout and complexity of the internal circuitry and switches, as well as the maker's design philosophy.

I haven't seen what the inside of the bomb looks like, so I can't make any rash judgments.

He looked at Shen Ting on the screen, still somewhat worried:

"Disarming a bomb is a difficult problem at every step."

Let's see what Team Leader Chen decides!

Although the difficult sandwich shell, buoyancy switch, and level have been solved, the remaining challenges are no less formidable!

...

Inside the mine, after the hissing sound of the liquid nitrogen spraying stopped, an eerie silence descended.

Armed police officers Chen Hao and Zhao Gang, who were separated, exchanged a glance. Even through their thick blast masks, they could see the surprise in each other's eyes.

My dear reader, there's more to this chapter! Please click the next page to continue reading—even more exciting content awaits!