The train driver in the courtyard

Chapter 140 Two birds with one stone

In a dark cave.

All eyes were fixed on Li Aiguo.

Isn't it just an ordinary stone?

Why bother to take it off the top of the cave.

"Captain Cai Fangshun, you often drill holes, come and take a look." Li Aiguo smiled and handed the stone over.

Company Commander Cai Fangshun took the rock, flashed the flashlight, and knew the origin of the rock.

"The appearance is dark green, and the joint surfaces are mostly pentagonal. This is a piece of basalt."

"wrong!"

The light beam swept across the side, and dots of dark gray light flickered.

Cai Fangshun's expression became serious, and he stretched out his fingers to press on the rock.

His fingers were covered with dark gray particles.

"Not basalt rock ash."

He put his fingers in front of his nose and sniffed it, his expression changed drastically.

"Magnesium powder, this is magnesium powder!"

"As the saying goes, 'If you want to smelt good iron, you must first smelt slag'. When steelmaking plants smelt special steel for railway rails, they will add magnesium powder to the steelmaking furnace to improve the properties of the slag."

"When I visited Anshan Iron and Steel on behalf of the railway soldiers, I saw iron and steel workers playing with magnesium powder."

Magnesium powder plays a very important role in the industry and is a controlled material. If ordinary people want to buy it, they must hold a letter of introduction and go to a chemical raw material store to buy it.

His face became puzzled, and his eyes were fixed on the rock: "It's just... how could there be magnesium powder on the rock?"

Li Aiguo took the rock from his hand and said with a smile: "There are not only traces of magnesium powder on it, but also aluminum powder, copper oxide, and ferric oxide. Look, this black piece is not dirt, but powder." activated carbon."

Hearing these words, the old cat who didn't take it seriously at first suddenly became serious.

These materials are all chemical materials, which are difficult for ordinary people to touch. How could they appear on the rocks in the cave?
Experience told him that anything that goes against common sense is an important clue.

"Patriotic, what's going on?"

Li Aiguo was just skeptical at first.

Now that these kinds of chemical materials have been found on the rocks one after another, I feel confident.

Holding the rock and walking among the crowd, with one hand behind his back, holding the rock in the other hand, he explained slowly.

"Team leader, the root cause of the matter is the explosion that did not use explosives."

"Comrade Little Man found no trace of the explosion at the scene."

"At that time, I was wondering that an impossible cave collapsed at the least likely location."

"Also, it's weird that there hasn't been an explosion yet."

The old cat nodded in agreement.

Li Aiguo continued: "You guys know that I'm a train driver, and I drive trains around all day long."

"The passengers on the train come from all corners of the country, and all of them are very talented and nice to speak."

"So, when I'm not driving the train, I always like to chat with those passengers on the train"

"Once, I met a university professor and talked about blasting."

"He told me that before liberation, an old scientist had experimented with a method of blasting without explosives."

"Mix together magnesium powder, aluminum powder, copper oxide, ferric oxide, and powdered activated carbon to make something called a rock expander."

"Just knock a small gap in the rock, pour the rock expansion agent into the water, stir it evenly into a paste, and pour it into the gap."

"After a few hours, the rock breaks down naturally, in exactly the same way that an explosive blasts a rock."

As soon as the words fell, Company Commander Cai Fangshun, who had been thinking deeply, nodded his head heavily.

"I've heard of rock expanders.

After the news that the old scientist invented the rock expansion agent spread.

The devil was worried about mining the mine at that time, so he immediately sent someone to arrest the old scientist.

In order to keep the formula from being taken away by the devils, the old scientist jumped into the river.

The recipe has since disappeared. "

As he spoke, anger appeared on his face: "After the liberation, we railway soldiers also tried to find the formula, but found nothing. I didn't expect that the devil would get it!"

As a railway soldier, I often have to blast mountains. Some mountains have special environments and are not suitable for using explosives.

Sometimes, Demomen need to risk their lives.

If the recipe for the rock expander could be found, a great deal of danger would be avoided.

Company Commander Cai Fangshun realized this instantly, and raised his head to look at the old cat.

"Comrade leader, the recipe is important for 10 minutes, please find it."

"do not worry!"

The old cat agreed, but turned its attention to Li Aiguo.

Since this kid can detect that the enemy has used rock expander, he must have an idea about finding the enemy.

Time was running out, so Li Aiguo continued, "According to the old professor, the rock expansion agent is very prone to danger during the preparation process. The old scientist was blown off his right hand back then."

"And Zhang Lie is a mountain dweller. Even if he knew the formula, he couldn't get chemical materials, and he couldn't make rock expansion agent."

"When we searched the fur shop, we did not find any instruments and books related to chemistry in Liu Chunjing's residence."

"So, there is still a shadow beside Liu Chunjing."

"Shadow has certain chemical experiment capabilities, and has access to raw materials for rock expansion agents."

Li Aiguo pointed to the top of the cave: "According to my estimation, to cause such a large-scale collapse, at least tens of kilograms of magnesium powder is needed."

"Shadow was able to obtain such a large amount of materials without attracting the attention of others. It is likely to be an engineer in a chemical factory, or a teacher in a university's chemical engineering department."

These words were like a ray of light, illuminating the gloomy mood of the members of the investigation team.

"Good boy, I really have you!"

Lao Dao, who was always not happy or angry, rushed forward and hugged Li Aiguo heavily.

Keke almost out of breath.

Why do gay men of this age like to express their gratitude in this way?
Why do lesbians just stand by and giggle?
It's not fair!

"The patriotic comrade's analysis makes sense."

"Swallow, you should immediately contact the higher-ups, and screen the suspects according to the criteria drawn up by Comrade Li Aiguo."

"Yes!"

Di di di da da da da, the radio waves passed through the mountains and flew to every corner of the land of China.

Countless comrades in special positions climbed up from the warm quilt overnight and went to work.

Rescue camp.

"Brother Diquan, come with me."

"Can I see my brother?"

Liu Diquan looked around in a panic.

The shadow of the guards could be seen through the camp tent, and the surroundings were silent, only the sound of his own pounding heartbeat could be heard.

Although he was locked in the tent, he also received wind.

The members of the survey team have been under severe scrutiny since they were brought up.

The review is a long and painful process, which will not start easily, nor will it end easily.

Now Li Aiguo asked him to see his brother.

Is there really something wrong with my brother? Li Aiguo decides
(End of this chapter)