Lin Jiangbei's eyebrows furrowed, and he dragged the two soft pastries in his hand and looked at Liu Xuan: "Old Liu, if you are afraid, it's too late to hide out now!" ”

"Lin, Stationmaster Lin, my old Liu is a cheap life, there is nothing to worry about. Isn't that worrying about your safety? Liu Xuan hurriedly explained: "Or, Stationmaster Lin, you tell me the next production steps, and then you go outside for a walk, and I will make it in the house according to the subsequent production steps, and when the bomb is completely made, I will go out and call you back when the time comes?" ”

Lin Jiangbei's eyebrows stretched out at this time, he smiled, and said to Liu Xuan: "Old Liu, you can put your heart in your stomach with peace of mind!" It's not that you haven't heard it, our Zhejiang police and intelligence department are preaching, saying that I am a rare intelligence genius in a hundred years of Zhejiang police and intelligence department, and my life is expensive, and I don't dare to make an earth-shattering career, how can I be willing to give my life so casually and unexplained? ”

As he spoke, he shook the two soft dough cakes in his hand at Liu Xuan, and told Liu Xuan: "Let me tell you, this thing is safe!" No matter how you steam, boil, roast, and fry, it won't explode. If you want it to explode, there are only two ways, the first is to plug in a detonator to detonate it; The second is to drip concentrated sulfuric acid on the dough, so that several chemical reagents in the dough can react with concentrated sulfuric acid, which can also quickly detonate it! ”

Seeing that Lin Jiangbei said so firmly, without the slightest hint of jokes, Liu Xuan's heart was put into his stomach. It's not that he's afraid of death, he works as an intelligence agent, and it's okay if he doesn't have a little of this awareness?

What Liu Xuan is afraid of is an inexplicable and worthless death. If it's just him, it's just that, but isn't the problem a rare genius like Lin Jiangbei who is rare in a century for the Intelligence Department and the Zhejiang Police Academy?

In this regard, the Intelligence Service has learned a hard lesson.

Take Wang Zixiang, the former director of the Tianjin Station of the Intelligence Department, as an example, which is a famous example that makes people regret.

Wang Zixiang was born in the royal family of Beiping, is the son of a famous family, in his twenties he obtained a doctorate degree in Western medicine from Peking Union Medical College, which was quite a remarkable achievement at that time, in terms of academic qualifications, far from Lin Jiangbei's Zhejiang Police Academy and Hangzhou training class graduates can compare.

But Wang Zixiang, a doctor of Western medicine, was inspired by Duan Yinong to join the Intelligence Department and serve as the stationmaster of Tianjin Station.

After Wang Zixiang became the head of Tianjin Station, he began to use his medical expertise to develop invisible poisons for the Intelligence Department. He even did not hesitate to test the drug himself, and took the developed drug by oral administration or injected it into himself to verify the effect of the drug. Because there is an antidote in advance, there are many dangers.

For this matter, Wang Zixiang's friend, Chen Gongshu, the then head of Beiping Station, persuaded him many times, but Wang Zixiang always didn't care. Finally, in 1934, during a drug test, he had a toxic attack and died of poison at the age of 30.

After this incident, the Intelligence Department felt sorry for itself, with Wang Zixiang's ability and age, if he could not take such a risky and radical test method and save his life, I don't know how much he could contribute to the Intelligence Department.

Not to mention anything else, it is just the production technology of anesthetic guns and bullets taught by the Hangzhou training class, and the "white medicine" smeared on the bullet head is from Wang Zixiang's special preparation (not to mention ether-based anesthetics), after Wang Zixiang's accident, because of the loss of the "white medicine" for making anesthetic bullets, the technology of anesthetic guns and bullets has also lost its inheritance in the intelligence department.

Straight to the point.

After Lin Jiangbei finished explaining to Liu Xuan, he pasted two soft dough cakes on the bottom of the iron pot, and then slowly baked them over low heat.

It's not that the use of medium fire will cause the dough cake to explode, Lin Jiangbei's main concern is that if the fire is too strong, it will be baked black by the surface of the dough cake, which will affect the appearance and taste of the dough bomb too much - after all, when Lin Jiangbei uses the dough bomb, there is no guarantee that he will not encounter the inspection of the patrol members of the Japanese Marine Corps, and if those Japanese devils really let him taste the dough bomb in person, he baked the dough bomb a little more delicately, and it is easier to swallow.

Liu Xuan stood next to Lin Jiangbei, staring at the two pieces of dough in the iron pot without blinking, but he stepped on the ground under his feet, and once there was an abnormal phenomenon in the dough bomb in the iron pot, he immediately pulled Lin Jiangbei's arm and fled as fast as possible.

As a graduate of the Correction Department of the Zhejiang Police Academy who has studied bomb making courses and witnessed the power of TNT explosives, Liu Xuan's fear of TNT explosives has formed an instinct in his bones, and this instinctive fear can be dispelled without really saying a few words of Lin Jiangbei's guarantee.

However, the worst scenario that Liu Xuan had envisioned did not happen, and in just five minutes, Lin Jiangbei easily turned the two pieces of dough back and forth twice, and then turned off the kerosene stove with his hand, and the two flour bombs that looked like baked dough cakes had been successfully completed.

"Well, the bomb part has been successful!" Lin Jiangbei smiled and took out a piece of bread bomb from the iron pot, handed it to Liu Xuan, and said, "Old Liu, do you want to taste what this cake bomb tastes like?" ”

Liu Xuan looked at Lin Jiangbei hesitantly and asked, "Stationmaster Lin, can this kind of thing really be eaten?" Won't there be any problems with eating? ”

"Of course you can eat it, it must not be a problem to eat, I will let you taste it!" Lin Jiangbei smiled, put the bread bomb back, broke off a small piece of bread from it, stuffed it into his mouth, chewed it carefully a few times, and then swallowed it, and said in his mouth: "Well, the taste is much better than I expected, and the bitterness doesn't seem to be so heavy." It seems that the chemical reagents sold in Shanghai are of higher purity. ”

Seeing that Lin Jiangbei really swallowed a piece of bread bomb, Liu Xuan couldn't hold back the curiosity in his heart, completely ignoring his appearance of shirking just now, cheekily reached out and broke a small piece of burnt yellow bread from the edge of the cake bomb in Lin Jiangbei's hand, stuffed it into his mouth and chewed it.

Not to mention, this bread bomb is really like what Lin Jiangbei said, the taste is not bad, at least it is much better than the taco sorghum cake and other coarse grain cakes that Liu Xuannian ate at home when he was young, except for a slightly bitter taste, there is no other problem. And the chewing texture is also very delicate, and when swallowed in the throat, there is no coarse grain cake throat like tortilla sorghum cake.

"Stationmaster Lin, the taste is really not bad!" Liu Xuan said, "If I hadn't watched your production process with my own eyes, I wouldn't have believed that this dough cake was mixed with TNT explosives and several chemical reagents, and it tasted almost the same as a real pancake!" ”

"Don't worry about the TNT explosives and those chemical reagents inside," Lin Jiangbei said, "as long as you don't eat the whole basket, even if you eat two or three of these dough cakes at a time, it will have almost no effect on your health." ”

"But if you really want to taste it, you can also make this bomb into toast and baked biscuits, which will taste even better. It's just that the production tools needed are more complicated, and we don't have that condition now, so we can only make it simple because of the ugliness, and make it into a pancake. ”

Speaking of this, Lin Jiangbei's tone was light again, "You have already seen the process of making the bomb part. Next, we're going to make a timed detonation device for the bomb, and if calculating the reaction time is a challenge for you, you just need to keep the process in mind! ”

While speaking, Lin Jiangbei took out the thin copper sheets he bought from the material bag, and then pointed to the thin copper sheets and said to Liu Xuan: "Lao Liu, you must remember clearly, when you go to buy thin copper sheets, you must make it clear to the merchant that you are buying brass copper sheets, and you must not buy copper copper sheets." ”

"Why, is there anything special about brass and copper?" Liu Xuan hurriedly asked. This is not the time to be a good baby, if he doesn't figure out the principle in the middle, when he makes a timed detonator in the future, he may have some accidents.

"Yes, very particular." Lin Jiangbei further explained to Liu Xuan: "The so-called brass is actually a copper-zinc alloy. And the so-called red copper is pure copper. In fact, when we use it to make timed detonators, not only copper cannot be used, but other copper alloys other than brass are basically not used. ”

"As for why, it's because copper alloys other than pure copper and brass can tolerate temperatures of 100 degrees Celsius for less than 70 percent concentrated sulfuric acid."

Liu Xuan is basically a scumbag in chemistry, and when he heard this, he hurriedly interrupted Lin Jiangbei's words and asked, "Stationmaster Lin, what does it mean to be able to withstand temperatures of 100 degrees Celsius?" ”

Lin Jiangbei was not afraid that Liu Xuan would ask questions, but he was afraid that Liu Xuan would not ask questions. Otherwise, Liu Xuan doesn't know how to pretend to understand because of his face, and when he wants to prepare this special time bomb himself in the future, there will definitely be a big problem.

"It's actually quite simple, that is, pure copper and most copper alloys except brass will not react chemically with 70% sulfuric acid at temperatures below 100 degrees Celsius. In layman's terms, that is to say, when the temperature is lower than 100 degrees of the facility, the concentration of sulfuric acid below 70% will not corrode the purple pure copper and other copper alloys other than brass. Lin Jiangbei explained to Liu Xuan.

Liu Xuan nodded, pondered carefully for a while, and then asked, "That means that brass can have a chemical reaction with less than seventy percent of sulfuric acid at ordinary temperatures?" ”

"Yes!" Lin Jiangbei said: "Brass is a copper-zinc alloy, and the higher the zinc content, the more intense the chemical reaction with sulfuric acid. ”

"Oh, which means that the higher the zinc content in brass, the more likely it is to be corroded by sulfuric acid." Liu Xuan muttered to himself, and then raised his head and said to Lin Jiangbei: "Stationmaster Lin, I understand this!" Read on! ”

Lin Jiangbei continued: "As for brass, the zinc content is generally between 15% and 50%. Brass with a zinc content of less than 35 percent is called alpha brass. When we buy brass sheets, we must remember to choose this kind of brass sheets. ”

"Why, Stationmaster Lin, didn't you just say that the higher the zinc content in brass, the faster the sulfuric acid corrosion?" Liu Xuan asked again.

"This question is a good question, simply put, it is that alpha brass with a zinc content of less than 35 percent has good plasticity and can accept hot and cold processing. Brass alloys with a zinc content of between 36 and 46 percent are known as alpha gabeta brass, which is brittle at low temperatures and is largely unmalleable. It is only malleable when the processing temperature is above 700 degrees Celsius. The brass with a zinc content of more than 46% is called beta brass, which is hard and brittle in nature, and does not have plasticity in both low and high temperature conditions, and cannot be processed by pressure! ”

As for why pressure processing is carried out, Lin Jiangbei said and reached out to pick up a thin glass tube and said to Liu Xuan: "Because we want to use a copper sheet to seal one end of the thin glass tube, because the diameter between the copper sheet and the glass tube cannot coincide exactly, then it is possible to require us to knock the thin copper sheet to make its diameter exactly match the diameter between the glass tube!" ”

"I see, I see!" Liu Xuan nodded, grabbed a pen and recorded the main points of Lin Jiangbei on paper. He was still confident that he wanted to rely on his own brain to memorize all the knowledge points that Lin Jiangbei said, but later found that he overestimated his ability, so he honestly picked up the pen and began to take notes.

"Next, I'll explain to you the principle of a timed detonator." Saying that, Lin Jiangbei first put the glass tube aside, then reached out and picked up an ampoule, and said to Liu Xuan: "This is the main part of the detonator, that is, the ampoule used to hold the medicine, we can put concentrated sulfuric acid into this ampoule in advance, and then seal the seal of the ampoule with an alcohol melting lamp." ”

As Lin Jiangbei spoke, he took a match and lit the alcohol melting lamp, then opened the glass bottle of concentrated sulfuric acid, took ten milliliters of concentrated sulfuric acid from a glass test tube, and then dripped it into the ampoule, and then stretched the nozzle of the ampoule to the alcohol melting lamp, closed the nozzle of the ampoule with a flame, and finally carefully placed the closed ampoule on the table.

"Next, we're going to process the copper sheets." Lin Jiangbei said, "What I bought this time is a thin copper sheet with a zinc content of 15%, and the diameter of the disc is one centimeter, but the thickness is divided into three types: 0.2 millimeter, 0.4 millimeter, and 0.8 millimeter. ”

"According to the chemical reaction equation, we can easily calculate that if these three specifications of round copper flakes react with 70% sulfuric acid, they will be corroded and penetrated for 5 minutes, 10 minutes and 20 minutes respectively......

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