[Conan] He is always on the front line of seeking death.

The wind that rose at night blew the debris from the explosion into the eyes of those who were watching...

Gu Jing and Miyano Akemi quietly watched the explosion in the square

"Ayu..."

At this time, Wang Ziyu was lying on the floor on the third floor. The shock wave of the explosion just now knocked Wang Ziyu out of control.

Standing up unsteadily

Then coughed twice

The dust is too big...

When I turned on the flashlight, I saw small gray-white dust particles floating around the light beam as soon as I turned it on.

Fluctuate.

Like bubbles in the sea...

Wang Ziyu shook his head before he woke up. It was more important to find his phone first.

Wang Ziyu covered his nose with his coat and looked carefully at the ground around him with a flashlight.

I finally found the phone and saw that it was still on a call. Just as I was about to say something, I choked on the dust, picked up the phone and left.

The dust is too big, it’s better to leave quickly...

The temperature was a bit hot, and there was even an orange-red fire not far away.

When I came up just now, I saw a cake shop not far from the stairs. This is usually the case...

There must be flour in it! ! !

Combustible solids in powder form not only pose a fire risk, but will also explode when exposed to a fire source once they are flying and suspended in the air, evenly mixed with air and reaching a certain concentration range.

The danger of dust explosion exists in many industrial production sectors. It is now known that there are seven types of dust that are explosive.

Among them is food!

flour! ! !

Wang Ziyu frowned

Characteristics of Dust Explosion: When dust suspended in the air is heated, the molecules on the surface of the dust particles volatilize gas due to thermal decomposition or carbonization, and mix with the air to form an explosive mixture.

Therefore, dust explosions are essentially gas explosions. Has the following characteristics:

(1) The mixture of dust and air flying suspended in the air also has a lower explosion limit and an upper explosion limit just like a gas or vapor mixture.

(2) The explosive reaction of the mixture of dust and air is also a chain reaction, that is, under the action of the fire source, a small original fireball is generated. With the development and spread of heat and active centers, the fireball continues to expand to form an explosion.

(3) Compared with the explosion of a gas mixture, the explosion of a dust mixture has the following characteristics: when a dust mixture explodes, its combustion is incomplete, which is different from a gas or vapor mixture. For example, when a pulverized coal explosion occurs, the combustion Basically, it is the gas product that is decomposed, and the ash has no time to burn.

(4) Dust explosions have the possibility of secondary explosions, because the air wave from the initial dust explosion will raise the deposited dust and form a mixture reaching the explosive limit in the new space, resulting in a secondary explosion. This continuous explosion Will cause extremely serious damage.

(5) The induction period of an explosion is longer. The combustion process of dust is more complicated than the combustion process of gas. Some have to go through the decomposition or evaporation stage on the surface of the dust particles, and some have to have a process of burning from the surface to the center. Therefore, the induction period Longer, up to tens of seconds, dozens of times that of gas.

(6) The initial energy of dust ignition is large, reaching the order of 10J, which is nearly a hundred times that of gas. Dust explosions will produce two toxic gases, one is carbon monoxide; the other is toxic gases caused by the decomposition of plastics (such as plastics) themselves.

As for plastic, there are quite a few burning packaging bags around.

Wang Ziyu looked back and saw that there were several deserted shops there.

What happens when those plastic bags are burned

Aromatic hydrocarbons dioxins.

Incomplete combustion of chlorine-containing garbage such as plastics can easily produce dioxins.

Dioxin, 1,4-dioxane, is a monocyclic organic compound.

It is a by-product that has no industrial use.

Also known as dioxins (qi), it is a colorless, odorless and highly toxic fat-soluble substance.

由1个氧原子联结2个被氯原子取代的苯环为多氯二苯并呋喃(PCDFs)。每个苯环上都可以取代1~4个氯原子，从而形成众多的异构体，其中PCDDs有75种异构体，PCDFs有135种异构体。

In short, it is poisonous.

Wang Ziyu thought as he walked, and finally there was less dust here, so he spoke to the person on the other end of the phone.

"The stairs on the second floor exploded. There was a cake shop near the stairwell on the third floor. It seemed to be burning down there. The stairwell was full of ashes just now."

Matsuda Jinpei and others thought about it and understood.

"Is there a dust explosion? Let the firefighters sprinkle some water on the third floor later."

Wang Ziyu gave the other party a thumbs up in his heart.

Appropriate dehumidification, it seems that the other party understands.

Wang Ziyu asked Matsuda Jinpei

"Do you know where else there is a bomb?"

Matsuda Jinpei was thinking, and when he was about to say something, he saw Hagiwara Kenji’s eyes.

After being slightly stunned, he handed the phone to Hagiwara.

After taking the call, Hagihara Kenji spoke silently.

"What brought you into the building?"

Wang Ziyu paused slightly,

Sure enough...it's time to show off your acting skills again

Thinking back on the draft in my mind

About Hagiwara Kenji

"Do you know the guy who left with the bomb at one o'clock this afternoon?"

There was a bit of coldness in the voice

Hagiwara Kenji and Matsuda Jinpei suddenly remembered

That person looks very much like this child!

When the two of them were about to say something, they heard the voice from the other side.

"My name is Wang Tianyu, and that person is my brother."

Called Wang Ziyu!

The three people thought so in their hearts.

Matsuda Jinpei said to Wang Ziyu that it was the current Wang Tianyu who

"What do you want to do? Revenge?"

Wang Ziyu continued walking in the dark building

The surroundings are so quiet that you can even hear the echo of your footsteps.

After waiting for a while, it didn’t take long

Only five or six seconds

Wang Ziyu said to Matsuda Jinpei

"I want to hit him, but I don't know who he is, I don't even know if he is a boy or a girl..."

The people over there were very quiet, listening to the voice on the phone quietly.

Hagiwara Kenji glanced at Matsuda Jinpei

Two little guys...

"Anyway, I really want the bomber to try what it's like to be in the hospital."

Matsuda Jinping pretended not to notice Hagiwara Kenji’s gaze and said

"Your brother is fine now, and the bomber has been caught."

"Well, I know...who is the bomber?"

Wang Ziyu smiled inwardly, Moritani Dier, just wait for me!

"Moritani Teiji, an architect."

Wang Ziyu expressed what was in his heart

"I think he is sick, and I suggest you take him to a psychiatrist."

A crazy perfectionist…

The people over there laughed

"You won't hit him?" Hagiwara Kenji was a little surprised.

"I would like to fight it myself, but unfortunately it is best not to have a stain on my life due to family reasons, so I can only think about it."

Wang Ziyu sighed, after all, not everyone can become smaller.

Wang Ziyu stopped talking and walked in the direction of the next bomb.

Suddenly a clicking sound came from the upper left

Wang Ziyu suddenly saw a child running from the left, and the ceiling above his head seemed to fall down!

At this time, Conan did not notice the loosening of the ceiling above his head.

He is still thinking

Mao Lilan is still up there! ! !

Suddenly, he saw a child holding a flashlight on the right, and his stunned face was suddenly replaced by panic.

"Be careful!!!"

Wang Ziyu yelled and ran towards Conan.

Conan was a little stunned

Suddenly I found that the ceiling above my head was about to fall!

Conan saw that the stone was about to fall, and as soon as he made a move to protect his vital parts, he was picked up by someone.

A step and a series of rolls left the area where the gravel fell.

"Well!"

Wang Ziyu felt that his waist would soon be covered with bruises. Just now, there were stone marks all over his back.

He calmed down and said to Conan

"Little brother, can you get up and give me a hand? My waist hurts a little..."

Conan just reacted

He's still pressing down on me. He sounds like he's only twelve years old.

But it sounds familiar...

Conan pulled Wang Ziyu up and said

"Thank you, big brother, but big brother, why are you here? There is no one here."

Those gloves...

The prince said casually and proudly as he fluttered the gravel on his back.

"I'm here to defuse bombs! I've already defused one. By the way, little brother, can you help me find the phone number? The policeman on the other end is still waiting."

Conan was a little stunned and said, "Defuse a bomb?"

Conan was a little confused and unconvinced

"Yes." Wang Ziyu turned over a stone, where is the phone...

"By the way! You came from the front left, right! Uncle said there was a bomb at the top of the stairs. Can you walk up the stairs over there?! Are there any traces of the explosion?"

Wang Ziyu suddenly remembered that he came up from the stairs over there!

There are only two stairs in total! !

Both of them thought of this

Conan was a little anxious, but he still found the phone and handed it to Wang Ziyu.

Still on the call, everything is fine

How to get up there...

The two of them looked at the ceiling that had just fallen!

The hole is big but too high to get up.

At this time Conan turned to Wang Ziyu and said

"Brother, can you let me go up?"

"Is there a reason to go?"

"Yes"

……

Wang Ziyu knelt down and said to Conan

"Little brother, across from my phone is a group of bomb disposal police. They will tell you how to cut the cord, but you must first take a photo and send it to the other party."

Conan figured it out. This is how bombs are defused...

Yes, only twelve years old

Conan said to Wang Ziyu, "Brother, I don't need it. I have the blueprint, but it's just one of the special bombs, so I don't want the phone. I have to rush to the fifth floor."

"Okay, you go up first and help me find a long, strong rope so I can climb up!"

Wang Ziyu walked to the top of the fallen cement block and handed Conan up.

Then a rope hung down, Wang Ziyu climbed up, and the little brother was gone.

Later, Wang Ziyu found another bomb

Continue to send it

Time passed by minute by second

period

"Brother, can the fragments of hand mine be removed?"

"...It can't be dismantled."

"Brother, are you very good at bomb disposal skills?"

"Okay……"

"I'll send you a question. Wait, I'll translate it... That's it."

Several people gathered around curiously.

On the left is a picture of a bomb that looks particularly fake to experts.

On the left is...

Two circuit diagrams? ? ?

My child, do you have any misunderstandings about bomb disposal?

I looked at the title

1. If you were a bomb disposal expert, which wire would you cut (a/b)? (3 points)

2. If you were a bomb maker, which wire would you install the timer on (a/b)? (4 points)

Note: The timer is equivalent to a switch, which is equivalent to a path during the countdown process, and the end of the countdown is equivalent to a circuit break.

The bomb disposal experts around were speechless.

Come on, this is physics…

Matsuda Jinpei asked with a suppressed smile.

"Why would you give us this kind of question?"

Wang Ziyu recalled the difficulties he had when he first learned physics and said with pain from the bottom of his heart.

"Because I never want to do this kind of question again..."

Although physics is very good now, it was really painful back then!

My sad heart suddenly surged up and I spoke out.

"I still knew it when I first started studying, and then I added parallel circuits and series circuits during the monthly exam..."

"Hiss—" Many people around him recalled their memories of previous studies.

Wang Ziyu continued

"Then after finally figuring it out, the teacher added three extra wires and a bunch of wires in the midterm exam, and asked us to draw a circuit diagram..."

Densely packed wires! ! !

I was almost blind at the time! ! !

Tragic... Most people recall the teacher's horror when the stitches were removed by mistake.

Matsuda Jinpei and Hagiwara Kenji also couldn't help laughing.

“During the final exam, there were actually a lot of missing lines.”

"Then what? Did the teacher let it go?"

Everyone is worried about this little kid.

"No...the teacher added resistors, ammeters, voltmeters and even transistors! I just learned about diodes at that time...Then the teacher asked us to measure the fluctuation range of current and voltage and cut the wire without exceeding the voltage..."

Listening to the sound now, it feels like the little guy is completely frustrated!

Cheer up, little one! ! !

"Are you okay?" Matsuda Jinpei tried to ask

He finally understood.

This is a child who was hit by the teacher...

Hagiwara Kenji was also a little bit dumbfounded

Should those who are shocked go directly to bomb disposal experts to learn the physical circuit version of bomb disposal questions...

Wang Ziyu sat on the ground, looking at another defused bomb and said

"I'm fine, just a little tired...

I get a headache now when I see the circuit diagram..."

Matsuda Jinpei smiled and said

"Just rest. Except for the bomb on the fifth floor, everything else is gone. Leave it to us!"

Wang Ziyu yawned and replied.

"Okay, I'll go to the first floor to rest for a while. I'm a little sleepy. I'll hang up the phone so I won't disturb you anymore."

"Yeah. Don't fall asleep, be careful."

Matsuda Jinpei ordered.

It's still very dangerous inside the building.

Wang Ziyu knew this very clearly.

So he grabbed the rope and jumped to the back of the third floor.

Wang Ziyu ran directly to the supermarket on the first floor.

I secretly took some snacks

It still tastes good...

Then throw the packaging and other things into the trash can far away.

Really far away...

Even to prevent others from knowing your fingerprints.

I also took a wet paper towel and wiped the packaging bag again.

I washed my hands and face again.

Pat your clothes clean.

All gray...

Finally, he sent a message to Gu Jing.

"never mind"

"Okay, where are you now?"

"First floor."

"Did the police come to arrest you? (＾-＾)"

"……No."

Wang Ziyu tied up her hair

Suddenly, a bell rang outside

I looked at the phone and saw it was twelve o'clock.