Other brain holes cannot be verified due to immature conditions around them or lack of props.

But the attempt at waterjet can still be pondered.

Guan Lang returned to the apartment and persuaded his cousin, who was going to go to school with an umbrella.

The rain was so heavy that I was soaked before I could go to school with an umbrella and brave the rain.

Dropped her downstairs and flagged down a taxi.

After sending off his little cousin, he went back upstairs to inquire about the principle of industrial waterjet.

He originally thought that the waterjet would be fine as long as the water pressure was large enough, but after the inquiry, he found that the water had to be mixed with garnet, emery and other abrasives for auxiliary cutting.

The principle of this high-pressure water jet cutting technology is mainly to pass ordinary water through an ultra-high pressure pump, and then pressurize the water to 400 megapascals, and in order to maintain the stability of the high-pressure water flow, it is also necessary to stabilize the pressure through the accumulator, and finally pass through a very small nozzle, about 0.1-0.2mm in diameter, you can spray a matchless water arrow of kilometers per second.

After reading the principle, he knew that he might have overthought it.

If he wants to reproduce a series of processes of industrial waterjet through Taiji, the difficulty is obviously not what he can achieve at this stage.

The minimum accuracy cannot be satisfied, and his current accuracy is about 1mm level, which is far from the required caliber.

In addition, the conditions for creating ultra-high water pressure are not met.

For example, if the surface area of a water droplet is 1 square millimeter, to create a pressure of one megapascal, it is necessary to apply a force of 0.1 kg in a tiny area of this square millimeter, and a force of about 400 kilograms is required for a pressure of 400 megapascals.

The maximum strength of his Tai Chi is about 110 catties, which is satisfying.

But he was completely unable to condense the force evenly over such a small area at the same time.

The difficulty is too high, and it feels like it is not at all the immortal operation that he may achieve at this stage.

The area of one square millimeter is too small, and the index finger and fingernail cover are almost a hundred times the size of this area.

The fact that he can manipulate the Tai Chi force with an accuracy of about one millimeter does not mean that he can condense all his strength in such a small range.

Although the imagination is beautiful, the reality is cruel.

Kilometers of water per second can cut almost all materials at high speed, glass, steel, stone, reinforced concrete, titanium, chromium and various composite materials, and only ultra-hard materials such as diamond can be used as a sharp edge.

He tried it in his bathroom.

First, a part of the force is used to hold a cloud of water in the air, and then a pipeline environment is simulated to transport the water flow, condensing the vast majority of the force at the end, squeezing the water droplets as much as possible to form water pressure.

It turned out that it was really unachievable, and it could only be used for performance at this stage.

There are several problems.

First, the pressure is not concentrated enough, and the fastest initial velocity of the water droplets shot is only thirty or forty meters per second, which is different from the water jet of kilometers per second.

The velocity of the water droplets decreases rapidly after ejection, and the water pressure transformed by his Tai Chi Force is extremely unstable, which also causes the water he presses out to be intermittent and unable to form a column of water moving at high speed.

Maybe it will be possible in the future, but it is still too reluctant in his situation now.

More stable control, mental power, and more powerful Tai Chi power are required.

Guan Lang ended his exploration of new moves.

It's not that there is no gain, maybe when the spiritual power is raised to a higher level or the strength is purified into innate true qi after tomorrow, the Tai Chi power will be revolutionized, and then the realization of ultra-high pressure waterjet will have a realistic basis.

Guan Lang routinely continues to take online classes.

The advanced course he bought was basically almost finished by him.

Aside from the lack of practical work experience, he felt that he was already qualified for a job of teaching others.

The rain was still getting heavier outside the window.

He walked over to the balconies, which had been moved bare, and looked at the rain of the sky that was so dark that it seemed to be able to squeeze out ink.

It's noon, but it's like night.

It's been raining for hours, and the rain hasn't slowed down?

It's not going to be waterlogged, is it?

Guan Lang was a little worried about whether the backward drainage system in the nearby old town would be able to survive.

It must be the heaviest rainstorm today or even in recent years, right?

Guan Lang glanced at the ground of the community downstairs, and the road had turned into a turbulent river.

Drink bottles, leaflets, clothes, and other bits and pieces of garbage float on the water.

On the main road in the distance, cars are cutting through the "river".

His gaze was on the distance, which was the direction of the courtyard.

It seems that his little eggplant, little tomato, and little Xi'an are in danger.

Such heavy rain.

Are you going to take Wu Yazhen home?

Guan Lang turned on his phone.

Wu Yazhen has already sent WeChat.

She told him not to worry, she suspended classes today, but now she must stay in the school classroom, and the school considers the safety of the students and tells the students to wait until the rain is light before leaving.

However, if the parents of the students arrive at the school and want to pick them up, the teacher will also let the students leave, and they can't go home alone.

Guan Lang asked if he wanted him to pick him up and take him home.

However, the little cousin doesn't seem to have this need.

On the contrary, there are some who are complacent.

Because of the weather, it is much more convenient to be able to ask questions to the teacher at any time during self-study at school.

Other students were chatting, playing on their phones, or waiting for their parents to pick them up, but no one came to steal her solo tutoring time.

Guan Lang thought about it, so he replied with a reply asking him to pick up and send WeChat at any time.

With such turbulent ground water, it is not safe to travel.

The main reason is that I don't know what kind of garbage and waste is mixed with the water, in case it is sharp metal fragments or glass slag that cut the legs and feet, and then soak in the turbid and dirty water, it may be infected with germs.

He is not afraid of rough skin and thick meat, but Wu Yazhen still has some risks with fine skin and tender meat.

On Douyin, videos of various rainstorms in the circle of friends have gone viral.

Tiannan is like a Venetian water city.

There are also many people who take out all kinds of large bathtubs as boats to row in order to shoot videos, and some people carry fishing rods to catch fish in the road water, which is obviously a natural disaster, but there are always people on the Internet who are lively.

After another two or three hours, he saw that the rain was still not light.

Although he didn't receive Wu Yazhen's WeChat, he pondered that something was wrong with the rain, and felt that it would be better to bring her back as soon as possible.

Although the school should have taken care of the safety of the students while staying in school, it would be better to go home.

And there should be few safer places than staying by his side, right?

After sending a WeChat message and discussing with Wu Yazhen, he took out rain boots and rain pants from the warehouse and hurriedly went out with rain gear.

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