This drill bit is specifically designed to work with high-hardness insulating materials and minimizes static electricity and heat conduction.
He handed the drilling rig to Shen Ting.
Without needing Shen Ting's explanation, all three present knew what to do next.
The outermost stainless steel window is just the first step.
Next, we need to drill through the middle layer of alumina ceramic insulation.
And the inner layer of pure copper conductor beneath it.
A physical passageway was actually opened in the sandwich-like outer shell of the bomb for observation and manipulation.
This step is also extremely difficult and dangerous.
The high-frequency vibrations caused by the rotation of the drill bit, even after the equipment has been damped, may still be transmitted.
This caused the mercury level, which was temporarily "frozen" by liquid nitrogen but was not malfunctioning, to be triggered.
The high temperature generated by drilling, and the cold area next to it that is continuously sprayed with liquid nitrogen, will also create a drastic temperature difference.
Thermal stress can cause microcracks, invisible to the naked eye, to form in the insulation layer at its weakest points.
Once the crack extends through, the inner and outer metal layers may come into accidental contact... the consequences are self-evident.
It can be said that any accident could cause the bomb to explode.
The atmosphere inside the mine became heavy again.
"Continue to maintain the liquid nitrogen spraying frequency; do not stop."
Shen Ting gave Xu Xin a reminder.
Next, turn on the ceramic drill.
A deep, high-frequency humming sound followed immediately.
The sound was amplified in the empty mine shaft, pounding against everyone's eardrums.
Shen Ting precisely positioned the drill bit tip against the center of the exposed alumina ceramic layer.
Instead of pressing down immediately, he first used very light force to make the drill bit start rotating at a very low speed.
Until a tiny positioning indentation is ground into the ceramic surface.
Then, the force increases slowly and evenly.
The drill bit rubs against the high-hardness ceramic, producing a sharp yet dull, teeth-grinding "sizzling" sound, interspersed with the sound of fine powder scattering.
Zhao Gang, Chen Hao, and Xu Xinyi all stared intently at the drilling point.
I was terrified that something unexpected might happen at any moment.
Time flowed slowly amidst the hissing of the drill and the crackling of liquid nitrogen.
Every second felt like an eternity.
finally--
"Cheers~~~"
A very faint, almost muffled sound, almost drowned out by the drilling noise, rang out.
The drill bit went through!
The feeling of obstruction in Shen Ting's hands vanished instantly.
He immediately shut down the drill and slowly withdrew the drill bit from the small hole he had just made.
A hole about three millimeters in diameter with clean edges appeared in the insulation layer and the copper inner shell below, leading directly into the bomb's interior.
Almost simultaneously, all four looked up at the countdown timer above the bomb—
05:35:12
The numbers are jumping.
05:35:11
05:35:10
...
The countdown continues smoothly.
There was no acceleration, no flickering, and nothing unusual happened...
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