The Colossal Worm would self-destruct, blowing itself to smithereens, then spraying its flesh and the acidic liquid inside its body in all directions.
As the Colossal Worm detonated, a large umbrella of electric sparks appeared again in the sky above the Type 59 upgrade.
This was the weapon humanity had developed against flying insects, and it also provided some protection against the Colossal Worm's acidic attack.
You see, the Type 59 upgrade wasn't very large, but it did have a controlled nuclear fusion reactor. In terms of power, the Type 59 upgrade was comparable to a large nuclear power station, and its output far exceeded that of nuclear carriers and nuclear submarines' reactors.
Therefore, the electric sparks from the Type 59 upgrade's roof could generate extremely high temperatures, causing the acidic liquid tossed high into the air and falling down like fine droplets to vaporize upon contact with the electric net.
This was the protective method of the Type 59 upgrade.