Ling Xu looked at Yuan Chaoyang opposite, and praised him sincerely: "I can't imagine that an auxiliary police officer has such a psychological element, it's really surprising to me." Xiao Yuan, based on what you just said, I shouldn't treat you as an ordinary auxiliary policeman, you have worked in the police station for 6 years, and you must have handled the mediation and interrogation work of many cases, and in a certain sense, these experiences have enhanced your anti-investigation and anti-interrogation capabilities. ”

Hearing this, Yuan Chaoyang smiled softly: "I only know that now it is /law/governance/society/society/society, everything has to be evidenced, Ling Suo, if there is no evidence, even if you doubt me in your heart, you can't do anything to me, not to mention, mine did not do anything to the police car driven by Yang Shanyong." ”

"You think I don't have proof?" Ling Xu looked at Yuan Chaoyang with a smile.

"I can't think of any proof you have?" Yuan Chaoyang's expression was still calm and calm.

Seeing Yuan Chaoyang's calm and usual expression, Ling Xu smiled faintly, he took out his mobile phone and made a call, a few minutes later, Ren Changlu of the Third Squadron of the Criminal Police came to the room with a tire, and after taking the tire from Ren Changlu, Ling Xu brought the tire to Yuan Chaoyang: "Do you know?" ”

"This is? The tires on the police car that crashed into the accident? Yuan Chaoyang replied in an uncertain tone.

"That's right, after Mao Jinfeng was killed, Comrade Ren Changlu of the criminal police team restored this tire through technical means." After answering, Ling Xu flipped over the tire, pointed to a small hole on the inside of the tire near the contour and said, "After technical investigation, this small hole is the culprit of the sudden puncture of the guide tire."

Although the technical department of the county bureau and the technical department of the city bureau have carefully investigated and studied this small hole, they have not been able to identify the cause of the formation of this small hole, some people think that it is pierced by steel nails, some people suspect that it is caused by tire puncture, and some people guess that it is pierced by an air gun needle.

Although the people in the technical department are not sure of the origin of this small hole, when I saw this tire, I immediately knew the cause of the puncture and how the small hole on the inside of the tire was formed.

The reason for this is that before I joined the police work, I used to work as a mechanic in an auto repair shop for a while, and I often encountered various accident cars, including vehicles crashed due to flat tires, so I have a clear understanding of the principle of a flat tire.

Let me first tell you about the causes of vehicle punctures, the so-called puncture refers to the sudden loss of air due to the rupture of tires in a very short period of time, and the vehicle instantly loses control. Cars usually use low-pressure tires.

The internal pressure of the tire is generally required to be 2.5 atmospheres, and many car drivers have a misunderstanding, that is, when driving normally, it is best to make the air pressure of the tire low, thinking that if you do this, the tire is not easy to burst.

Based on this understanding, many car drivers often dare not fill the air when inflating the tires, they are used to letting the tires deflat, in fact, the tire pressure is too low to lead to a puncture. When the tire pressure is too low, the contact surface between the tire and the ground increases, and the friction resistance during driving also increases.

In this case, the tire repeatedly bends and straightens at a high frequency, and for a tire with low air pressure, this movement is much greater than under normal air pressure, similar to bending and straightening a wire very quickly and repeatedly.

As a result of the wire being repeatedly bent and then straightened, the bend of the wire quickly reaches fatigue and breaks. Tires with low air pressure will also reach that fatigue point after running at high speed for a period of time, and if the air pressure in the tires changes at this time, a puncture will occur. ”

When Ling Xu said this, he pouted to Yuan Chaoyang: "An excellent driver, in addition to being skilled in driving, must also know a lot about vehicle troubleshooting, only those novice drivers can only drive and don't know how to maintain the car, in terms of your driving skills, you must be able to understand what I said, how about it?" Am I right? ”

"Almost, but I would like to add, sometimes the weather temperature is too high, driving is overspeeding, the weight is overloaded, the tires are worn out, these situations will cause a puncture, who knows what the reason for the tire burst?" Although Yuan Chaoyang looked like he was supplementing what Ling Xu had missed, he was actually justifying himself, and Yuan Chaoyang wanted to guide the cause of the tire puncture in the rest of the directions.

Ling Xu heard the meaning of Yuan Chaoyang's words, so he corrected it on the spot: "You are right, there are indeed many reasons that can cause tire puncture, but when Mao Jinfeng was driving a police car, the weather temperature was not high. He was walking on the main road of the county seat, and there were many vehicles and pedestrians around, so even if he wanted to, he couldn't overtake. It was even more impossible for the vehicle to be overloaded, because he was alone in the car at the time.

As for the tire wear and tear, now this tire is placed here, you can take a look, the outer tire texture is clear, there is no internal damage, this tire has no wear at all, so that you can determine the real cause of the puncture, that is, the air pressure is abnormal, and the reason for the abnormal air pressure is this small hole on the inside of the tire. ”

When Ling Xu analyzed this, Liu Xiaoyong and the other people in the room had already seen the doorway, and everyone looked at Ling Xu and Yuan Chaoyang, both surprised and admired Ling Xu's analysis and reasoning, and shocked by Yuan Chaoyang, an auxiliary police officer who was not good-looking, they didn't expect Yuan Chaoyang to have such a powerful psychological element.

Looking at Ling Xu and Yuan Chaoyang standing in the middle, everyone was full of expectations, they wanted to see who would win the battle between the two.

After talking about the cause of the tire puncture, Ling Xu paused, and then he pointed to the small hole on the tire and analyzed: "Many people think that this small hole in the tire is formed by the breakdown of steel nails or other spikes, but it is not like that.

Based on my previous experience in car repair, I guess this small hole should be drilled out with the drill bit of a hand-held electric drill, because after the steel nail and other items are pierced into the tire, under the action of the extrusion force of the tire itself, it will be tightly squeezed by the tire, and then the steel nail will be removed with a tool, and there will only be puncture marks on the tire, and there will be no hollow holes. ”

Yuan Chaoyang was originally standing next to him with a calm smile and listening to Ling Xu, but when Ling Xu said this, Yuan Chaoyang didn't know what he thought? His face changed suddenly......