Chapter 670: Fatal 1 shot

The long and short shots were alternated, and one of the MG4 bullet chains quickly emptied. Qi Lin dropped the machine gun, picked up the HK416C and started to charge forward, and at this time, No. 3 and No. 4 had already rushed downstairs to Burger King. , A grenade that opened the tab was thrown directly onto the roof platform.
"boom!!"
A violent explosion sounded, and a large amount of lime powder and fragments fell down rustlingly. Numbers 3 and 4 rushed into the front hall of Burger King, raised their muzzle, and fired at the ceiling together.
The bullets drilled hundreds of dense bullet holes on the ceiling. Their blasting almost completely blocked the route that the people on the roof wanted to leave with the stairs. If the other party chooses to jump out directly, they are likely to collide. Qi Lin rushed over.
"I'll rush to solve him!" Number Four said as he ran towards Burger King's back kitchen, planning to rush up the stairs to the top of the building, but before he ran to the kitchen entrance, he was pulled by Number Three.
"Thunder."
No. 3 said, No. 4 noticed that at the entrance of the kitchen, there is a thin transparent line. This thin line is inconspicuous under normal circumstances and cannot be seen unless you look closely, but the explosion just now will cause a lot of The lime shook down from the ceiling, and a small amount of off-white powder was stained on the thin thread.
"Didn't you say that you are good at mine dismantling? You can't find such obvious traps?" No.3 said with some dissatisfaction.
"Sorry, I was impatient..." Number Four said with some shame, and took out a set of tools for mine removal from his backpack.
"I'll help you cover, you removed the trap." No. 3 held MK5 with both hands and aimed at the stairs through the door frame, while No. 4 squatted down at the door.
"This is a serial trap. If we choose to cross the first trip wire directly, there will be a second trip wire one meter later. The second trip wire is glued to the ground, whether it is stepped on or tripped. Will trigger traps." Number Four said after observing for a while.
Although the traps are very cleverly arranged, the two traps are the simplest. They use the pulling force from the trip wire to detonate the grenade hanging on the back door. No. 4 puts the finger into the safety pin of the grenade to hold it down. , And then cut the two trip wires with a dagger with two clicks.
"Okay. The trap is lifted, let's go—"
"Stand there and don't move!" Just as No.3 and No.4 were about to move on, Qi Lin had already come behind them and called them to a halt.
"What's wrong? Is there a third trap?" No. 3 and No. 4 immediately settled in place, motionless.
"See the hanging cable in the corner of the kitchen?" Qi Lin said.
No. 3 and No. 4 immediately followed his fingers and saw that in the corner of the kitchen, the door of the electric box was smashed open. A cable with a thickness of two or three centimeters was torn off and dropped to the ground. , There are some small electric sparks constantly appearing at the break of the cable.
"Although I don't know why there are high-voltage cables in the electric box of a Burger King's kitchen, I don't know why the buildings in the ruins of the city still maintain electricity, but if you take a few steps forward, no one I can't save you." Qi Lin said solemnly.
"It's the stepping voltage..." As Qi Lin said, No. 4, as an architect, understood it instantly, and immediately burst into a cold sweat.
The so-called step voltage means that when a wire directly touches the ground, the current passing through the wire will spread from the contact point between the wire and the ground to the ground. With this contact point as the center, a potential partial area is formed.
In this potential sub-region, the closer to the contact point, the more concentrated the current, the higher the potential, and the farther away from the contact point, the more dispersed the current and the lower the potential.
High school physics textbooks have explained these contents in detail-inside the power supply, current flows from the end with low potential to the end with high potential. This is the direction of electromotive force, while outside the power supply, current flows from the potential. The high end flows to the low end, which is the direction of the voltage.
If someone enters this area at this time, when the steps between the feet are too large, there will be an obvious potential difference between the landing points of the feet. Due to this potential difference, the human body will form a closed loop with the ground-current It flows into the human body from one leg of a person, and then flows out from the other leg...
Although this circuit seems to have no current passing through important organs, it will cause electrocution and paralysis of the legs, and the whole person will lose balance and fall to the ground. At that time, the current is not only passing through the legs.
"Triple traps, the other party is cunning enough..." Most people will relax their vigilance after discovering the first two traps. A cable that is not very eye-catching may be ignored directly.
Although the trap formed by the step voltage is very secretive, once discovered, the corresponding method is also very simple-as long as the legs are brought together or one foot is maintained to support the body, the potential difference between the contact point of the body and the ground is not too large ~EbookFREE.me~ Electricity will not pass through the human body.
The location where the cable touches the ground is six or seven meters away from the foot of the stairs. At this distance, it is relatively safe to jump on one foot. If you are a little closer to the foot of the stairs, I am afraid that only the tip of the toe will not cause an electric shock— —Of course, the other party would not do this, because this road was originally one of the sniper's retreat routes, and no one would be so stupid to directly block their retreat route.
The three people quickly rushed to the top of the building. However, at this time, the roof was already empty, except for an abandoned M82A1 anti-material sniper rifle and a fragmented grenade that was blasted a little broken. Tattered camouflage cloak.
"He should be injured."
Qi Lin glanced at the mottled blood on the ground that hadn't solidified. The bloodstain stretched to the edge of the roof. Obviously, the other party jumped from here while they passed the back kitchen.
"The scale of the ruined city is not large. Counting the time, the opposite support should have arrived." Qi Lin and the three clung to the edge of the rooftop. Except for the highest floors of the building at three o'clock, this location is In an almost perfect shooting blind spot.
"Then what should we do?" asked number four.
"We have to leave here. Although they can't hit us in this position, we can't hit them either..."
Before Qi Lin spoke, a black and round object was suddenly thrown from downstairs to the top of the building-just a few minutes ago, they used the same method to injure the sniper hiding on the top of the Burger King building.
No. 3 subconsciously picked up the grenade and threw it out forcefully. At the same time, gunshots sounded not far away, and No. 3, who protruded half of his body, fell!
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