After confirming that there was nothing good inside, Bi Fang grabbed the edge of the iron box and dragged it towards the door little by little, explaining as he did so.

"Blasting is sometimes the only way to enter a closed building. The key is to put huge and heavy ballast in front of the blasting target to prevent the blast fragments from ejecting here, and at the same time, let the blast wind be aimed at the target. What I am aiming for here is

Door locks and hinges on doors.

In fact, this is similar to bullet shooting. Guns also use the barrel to limit the direction of the bullet, allowing it to fly towards the target path, thereby focusing on the target. This is a principle, but this ballast is not heavy enough, we can also go to

Stuff some stones and soil inside to increase its weight and prevent it from being blown apart during an explosion.

As for how to design the actual blasting part..."

Bifang, who blocked the door, took a breath and smiled at the water friends who were looking at him: "I won't tell you this. In our industry, many tips cannot be passed on indiscriminately. If something happens to me, I will be miserable."

But I am very confident that it will definitely not be difficult to blow open this door."

The water friends were greatly disappointed when they heard the first half of the sentence, and even thought it was a trick, but after hearing the second half, they still smiled with understanding.

[You only discipline, I don’t blame you if something goes wrong (dog head)]

[Bang bang bang, open the door, I’m checking the water meter]

[Open the door, your express delivery has arrived, pick it up quickly]

[One dares to teach, the other dares to learn]

"Okay, we can get started."

Blocking the side door with an iron box, Bi Fang picked up the acetylene bottle and went between the ballast and the side door, put it in the middle and stuck it, then put down his backpack and took out the bottle of antifreeze he had seen before. The audience

Do you still remember that it contains ethylene glycol, and there is a danger of burning and exploding when exposed to open flames.

"Ethylene glycol will burn and explode when exposed to an open flame. This is actually similar to gasoline. We can insert a piece of cloth into it, soak it in, and it can act as a lead."

Bifang stuffed a slender strip of cloth into the bottle, contaminated it with ethylene glycol, and pulled it out again. One end was wrapped around the mouth of the acetylene bottle, and the other end was pulled out and placed among the ballast.

outside.

Then make a fire and light the fuse.

"In the ruined city, it is a bit difficult to drill wood to make fire. You should have seen it before. It took me a lot of effort to light a fire. Moreover, it has just rained heavily, and dry wood is even more difficult to find. Plus,

It makes it more difficult to make a fire, but after entering the factory before, I found a good thing that can help us make a fire quickly."

Bi Fang dug around in his backpack, grabbed a small bottle, and opened the lid. Under the dim light, it seemed that it was filled with black powder.

potassium permanganate!

Many viewers who had been watching immediately recognized what this "familiar" bottle was.

It's the potassium permanganate I found in the medicine cabinet earlier.

But isn’t this thing used for disinfection and marking?

Audiences with good memories may still remember what Bi Fang said at that time, that it was for disinfection and marking, and the marking had to be in the snow. What does lighting a fire have to do with it now?

"It's a big deal. I see you haven't learned chemistry well. Potassium permanganate is a strong oxidant. When it encounters a reducing agent, it will automatically decompose and emit a lot of heat. When these heat accumulate, it is the best ignition material.

It’s very convenient to make a fire, and as for the reducing agent, we actually have it too.”

Halfway through, Bi Fang brought the car antifreeze from the side, placed it in front of the drone, and waved it in front of his friend with a smile.

"Ethylene glycol is one of the reducing agents that can oxidize and decompose it. Generally speaking, alcohols are reducing. Unfortunately, not many people seem to realize it."

Bi Fang only brought a backpack to survive this time. All the things in it were collected before and the audience knew them. However, there were very few people who could connect them and make use of them.

With these things, it is very simple to start a fire.

Bi Fang took out a sponge pad from his trouser pocket. Before setting off this morning, he had thought about the possibility of making a fire, so he tore some sponge from inside the car and put it in his backpack.

The sponge is fluffy and soft, contains a lot of air inside, and is dry and flammable, making it a good ignition material.

Bi Fang first picked some weeds and put them on the lead wire as a cushion.

Bi Fang immediately ran more than ten meters away and hid behind a big tree, covering his ears.

Blast, right now!
Chapter completed!