PS: Thank you to the brothers who voted for the monthly ticket, thank you, thank you!!

Everyone looked at the pit in the distance, and felt that it was unnecessary for Dong Ku to withdraw all the soldiers on the bunker along the way, and to withdraw all the surrounding soldiers, was it so powerful?

Just as he was anxiously waiting, the ground shook violently, and then, in a deafening rumbling explosion, a fiery dragon rose into the air in the distance. The ground shook violently like sifting chaff, making everyone standing three kilometers away feel that the frozen ground was undulating, and people were even more unstable on their feet.

The firelight flickered, the sky suddenly brightened, and in tens of seconds, the fireball erupted, and then fell into darkness again.

The ground shook violently, causing cracks in the frozen soil to appear in different shades. In the sky, there was a strange whining sound, making the night seem so terrifying out of thin air.

"Good concealment!"

Dong Ku shouted in the headset, then lowered his head and avoided the observation port.

Everyone was frightened by the explosion, and the shock was just in time for the shells of the artillery positions to explode.

It's so powerful......

In the flickering light, everyone was stunned for a while.

Before I could come to my senses, at a distance of three thousand meters, those concrete blocks were like artillery shells, whining and crackling, and the tanks and armored vehicles in front of us clanged.

Bang so far......

Feeling the distance of the cement block, everyone knew that this power was greater than the previous explosion of the cannonball, although it was not as loud as the explosion, but the power was obviously not small.

"Captain...... You have repeatedly made the widespread use of this replace coal...... Didn't you make a bunch of bombs and put them in people's homes......"

The old and calm Liu Chengcheng was really shocked, he often watched his subordinates introduce the use of this thing, and felt that it was very convenient, and cooking was cleaner than a coal stove, and there was no need for pottery ashes, but this thing actually had such a great power. Isn't that a bomb to be blown up in Harbin? So much stuffing......

Dong Ku couldn't help but sigh when he saw Liu Yucheng's worried appearance: "Ha Luha! Sir, as long as it is operated properly, there will be no problem, besides, this liquefied gas tank is generally not prone to danger, except for air leakage, it will explode if it gets into an open flame. Generally speaking, it is not a big problem, and now it can have such power, mainly because it is released into the air and can be fully burned, otherwise a tank will not even collapse a floor, as for the principle, it is because it cannot be fully burned when it explodes, resulting in a decrease in power. ”

"Oh......"

Liu Yucheng still had palpitations, and he felt frightened when he looked at the darkness in the distance. I guess he won't put this thing in his residence in the future.

"It's time to send out a scout team."

Dong Ku didn't talk to Liu Yucheng again. Ordered directly.

Qu Jun just finished speaking in Dong Ku, and shouted in the headset: "Put on a gas mask, self-oxygen, and go!" ”

With his order, the long-awaited tanks roared into two formations, escorting the infantry riders to the bunker.

By this time, the bunker had been lifted. The blast wave of the explosion did not blow up all the bunkers, but it was also full of holes.

The Japanese army inside was unlucky. At the moment of the explosion, they only felt their whole bodies tighten, and a huge force enveloped them, and then their consciousness disappeared.

The inverted bunker near the outermost edge was the most destructive, shattering everything that moved. The iron gate and bunker were also destroyed, and the shockwave erupted from the various openings leading to the surface, sending the bunker flying countless blocks of cement.

The explosions were almost cascading, and from this end, they exploded to the most collapsed position in one go. In the tunnel, there was not a single living person, and even the Japanese soldiers hiding in the mezzanine were indistinguishable due to the explosion and were shocked to death in the mezzanine.

The corpses everywhere were not burning badly, because the flames were only one blow along the position where they could be sprayed, and most of the gases that were not fully burned were ejected, and they continued to explode in the process, which is why the explosions continued to sound and the ground to shake.

Even the bunkers linked to the main tunnel behind are the same, those camouflage holes are all opened, and the Japanese soldiers inside are all blown up, just like that, the power of nowhere to vent will also collapse the weak point in the middle of the tunnel, and there are sections of large pits, and the mud and cement blocks are flying everywhere.

There is a strong smell of liquefied gas in the air, and it drifts around with the cold wind, although it will not explode again, but if you stay in it for a long time, you will be poisoned, and eventually die of lack of oxygen.

The fighters, wearing gas masks, opened the oxygen tanks, and in the roar of the tanks, the tunnels stopped and quickly entered for inspection.

Inside, the tunnel was full of messes, all the fragile ones were scattered on the ground, although most of the corpses were not shattered, the concentration in the head was high, and the part with the most powerful explosion, the Japanese army could not even find the corpses.

The soldiers quickly drilled into the pit with flashlights, and at the risk of exploding again at any time due to the high concentration, they found the gas bombs buried in debris and corpses according to the location of the first pit, but fortunately the gas bombs did not explode or crack.

"The goal is found! Safe! ”

After the fighters found the gas bombs, they reported the results as soon as possible.

"Withdraw! Gas bombs are safely brought back. ”

Without the slightest hesitation, the commander ordered the entire crew to retreat.

There are five ground tunnels that have been blown up, all of which are connected by this main tunnel, and the Japanese troops inside have all died, and there is no need to stay longer if they find poison gas bombs.

It's so powerful......

Everyone in the command headquarters was stunned by the description of the scene, and marveled at the new type of bomb. Dong Ku looked at everyone's reactions, and knew that if he didn't explain, he was afraid that everyone would be confused, so he said: "Everyone may not understand this effect, let me explain it to you." ”

Seeing that everyone's attention was concentrated, Dong Ku smiled and said: "The calorific value of one kilogram of liquefied petroleum gas is 46,100 kilojoules. The explosive energy of one kilogram of T.N.T explosives is 4,200 kilojoules, but the explosion energy is not proportional to the intensity of the shock wave. So the energy of the complete combustion of one kilogram of LPG is about equal to the power of 10 kilograms of T.N.T explosives. The U.S. military's Mk.II grenade is only loaded with 56.7 grams of T.N.T, and the power of 10 kilograms of T.N.T explosives is equivalent to about 176 Mk.II grenades exploding at the same time. ”

It's so powerful......

The crowd was speechless. With such power, why do you need explosives, these gas canisters are all civilian, isn't it a waste?

Dong Kuzhi said everyone's thoughts, paused slightly, and then said: "This power depends on the concentration of liquefied gas in the air, and whether the environment is closed, if in an open area, the concentration of liquefied gas is less than 30%, the explosion can explode, but the power is much smaller, and it may not even kill people." The tunnel environment is closed, according to calculations, the concentration is at least 30%, and the area of high concentration can reach 50%, so the power of the explosion is so great, at home, a liquefied gas tank can blow up a floor at best, luckily, but the kitchen was collapsed, plus the transportation is inconvenient, the use of the tank is not as convenient as the grenade, this thing is destined to be civilian, however, the tunnel to deal with the Japanese army is still usable. ”

"Good stuff!"

Zuo Boyang came in with a tank from outside and said, "Listening to what the captain said, isn't this thing suitable for blowing up the pit?" It's a little bigger, if you press the timer explosive, this is a small and powerful bomb, buried in the Japanese tunnel, the gas is released, touch! Even explosives were saved. ”

"There are small tanks, and under the design of turning back, bring some with you, which is convenient for bombing the tunnels of the Japanese army." Dong Ku said with a smile.

Liu Yucheng applauded and said: "Okay, I'll arrange the design of the tank, place the explosives, and get a timing device to specially bomb the tunnel, which is really good." ”

Dong Ku raised his hand and looked at the table below and said, "Inform the troops, take turns to destroy the first line of defense, and don't stop at night." ”

As soon as Dong Ku's order was issued, Zuo Boyang hurriedly said: "Captain, this method is good, according to what you said, the gas concentration reaches 20% and it is dipped in the fire, and the Japanese army turns on the lights or smokes in it, isn't it going to be detonated in advance, and it can't spread the entire tunnel?" ”

Also right......

Dong Ku thought for a moment, indeed, twenty minutes is a bit long,

"Then simply divide the sections, occupy each tunnel, and then put the tank in sections, the valve is opened to the maximum, and there is no need to block the passage mouth, and it will be detonated in five minutes, which is enough."

As he spoke, he picked up the pen and began to calculate the cube of a section of the pit to see how many tanks were appropriate.

Shaoqing, after getting the value, ordered again: "According to the direction of the main tunnel, put five cans in a bunker, or a grenade to open the way, blow up the tunnel, cover with gas bombs, put down the tank, and detonate in five minutes, without covering the hole." ”

"Yes!"

Qu Jun just waited for the order to begin to convey.

The tanks here drove into the Japanese positions in rows, and the soldiers waiting in the tunnel had already turned off their lights and left the top of the tunnel, on the helicopter, guarding below. The Japanese army did not know what kind of attack the road encountered under the violent shock, but they couldn't contact the bombed tunnel, and even Umezu Mijiro was stunned, and couldn't understand how such a well-designed tunnel was destroyed, even if the advance army dropped explosives, then all the tunnels had to be thrown!

But he didn't know the situation of the road, so he could only wait anxiously, and the tunnel over there lost contact with the rear, so he had to watch dryly. He knew that this would be the advance army's desire for him to be reinforced on the ground, and the ground attack of the advance army, he really could not be sure to resist, except for positional warfare, he did not have the confidence to fight a ground field battle with the advance army. From Shanghai to Xuzhou, he knew that it was now difficult for the Japanese army to compete with the advance army, and that the dispatch of troops was also fueling; unless the positional battle was stalemate, the troops could be divided, encircled, and the troops carried out tactical and strategic movements, otherwise, the troops on the march would not be able to withstand the sharp attack of the advance army at all.

As the tank slipped and covered the infantry vehicle pulling the liquefied gas tank into the position, the bombardment was hit, one by one the tunnels were blown open, and then, in the loud bang, the position of the internal entrance of the tunnel was blown out of a big hole, and the gas bomb had entered, the Japanese army was very obedient to put on gas masks, and closed the iron door, and quickly built a bunker behind the door, set up a machine gun, and waited for the enemy to attack.

But they knew there that the moment they put on their gas masks, they were already at the ghost gate, one foot in the door and one foot outside the door, and all they needed was to live for a few more minutes. (To be continued......)