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"Add three return tubes...... Remove the interval ...... Ross No. 3 aluminum alloy ......" David stared at the hybrid engine, muttered to himself, suddenly stood up, walked to the side of the machine, adjusted the machine, opened the steam valve, and took the Ross No. 3 aluminum alloy plate, and began to make a new cover impatiently.

Thundered!

The machine began to operate, and the aluminum alloy plate was gradually rolled and deformed in the machine.

Turning off the steam valve and taking out some hot aluminum alloy plates, David began to cut eagerly again......

Ten minutes later, three new return pipes had been installed in the hybrid engine, and the grid was also cut off, leaving only the cover uninstalled, and it took another three minutes before David put down the pen, technical the internal pressure calculation, took the new cover and buckled it on the engine, and slowly screwed the screws.

Several students had already stopped what they were doing and looked at David, but their eyes also glanced at Xia Zuo from time to time, because what David was doing now was exactly what Xia Zuo said before.

With the power plug on the left side of the engine and the small steam pipe on the right, David stood up, first turned on the power, and the protruding shaft of the hybrid engine began to turn, and the speed quickly increased to medium.

David slowly put his hand on the valve of the steam pipe, looking a little nervous, and slowly pressed the valve wrench down.

Puff puff...... The exhaust hole began to spew outward, which lasted only a few seconds before stopping, the hinge began to accelerate, and the hands in the upper speed gauge began to move slowly, moving from the green area representing medium speed to the yellow area representing high speed, and gradually moving closer to the red area representing super high speed.

David's hand was still on the steam valve, his eyes were fixed on the dial, he was afraid that something would go wrong, so turning off the steam in time could also prevent excessive damage to the engine.

What David feared did not happen, the pointer moved slowly, but steadily, and as he watched, the pointer slowly entered the red zone, but did not stop, but continued to try to move closer to the purple zone, which represented the dangerous speed.

"Succeeded?" exclaimed, Allen, a fourth-grader who usually talked a lot, and looked up at Xia Zuo.

Squeak! David slammed off the steam valve, it was enough, it was enough to reach super high speed.

The engine spewed out its last steam, and the shaft slowed down until it came to a complete stop.

"It worked. David muttered, raised his hand and rubbed his stubble chin, looking very excited, he turned his head to look at Xia Zuo, and asked excitedly, "Xia Zuo, how did you come up with it?"

"I ...... That's it, I just think it should be like this, so I said, I don't have any special thoughts......" Xia Zuo said intermittently, he couldn't tell David, it was he who went back and told Ray about it, and Lei told him.

The secrets of androids cannot be revealed, and now even Fanny doesn't know that Ray is an android, Fanny knows that Ray is a strong man, but she doesn't care too much about probing, because Xia Zuo is the son of King Charles, and it's not strange that a guardian powerhouse appears next to him.

David has no doubts about Xia Zuo's explanation, because those changes do not involve too advanced mechanical knowledge, the main problem of the hybrid engine is the lack of air return space, and the flow channel is too small.

Thinking has fallen into a dead end, so there has been no research results.

"Xia Zuo, thank you, thank you!" David walked up to Xia Zuo and gave Xia Zuo an excited hug.

"Ahaha...... Teacher, I just mentioned a small jian, no need for this. Xia Zuo smiled dryly, a little uncomfortable.

"You don't understand...... David let go of Xia Zuo, looked at the hybrid engine and shook his head, and sighed: "The small hybrid engine has not been developed in the world, this is the world's first small hybrid engine that has successfully reached ultra-high speed, I want to use it as a technical gift and send it to the Czar Russian Corgi Shi Yàn room, so that I can send Hovis and the two of them to the Steam Alliance for further study." ”

"Xia Zuo, you have helped me a lot!" David looked at Xia Zuo and squeezed Xia Zuo's shoulder hard.

"Hehe, luck, luck!" Xia Zuo scratched his head, showing a somewhat embarrassed look, he was really embarrassed, because this problem was not solved by him at all, but Thunder!

Four months later, England City entered winter, and after a few snowfalls, the whole city was covered in snow.

On this day, four and a half months after entering the steam department, Xia Zuo successfully passed the guò exam, was promoted to the fifth grade of the mechanical department of the British Royal College, and obtained the certificate of fourth-level mechanic, according to the regulations of the college, as long as Xia Zuo goes further, called the fifth-level mechanic, he can apply for graduation in the college, and the college will issue a letter of introduction to recommend him to the first shipyard in the United Kingdom.

For Xia Zuo's rapid progress, David has been numb, four and a half months, counting the previous 100 ~ 100,000 \ small! said time, it is only half a year, from ignorance to mastery of machinery in half a year, Xia Zuo's talent, David has only seen in his life.

He had already decided that when his two nephews were eighteen years old and Xia Zuo was sixteen years old, he would send the three of them to the Steam Alliance together, and apply to the academy for a talent escort team to ensure the safety of the three of them in the Steam Alliance.

Leaving the underground mechanical hall, Xia Zuo couldn't wait to go to the college library, went to the core area on the fifth floor and rummaged through, and thirty minutes later, Xia Zuo returned to the wooden house.

"Ray, I got it. As soon as he entered the room, Xia Zuo happily shook the two books in his hand to Lei and walked quickly to the side.

"The Theory and Practice of the Core Power of Artificial Humans" and "The Decomposition of Artificial Human Configuration", these two books are the two books with the highest knowledge content in the library of the Royal Academy.

Energy cores, energy converters, liquid metal configurations, and so on can all be briefly understood in the book, of course, the core technology of "igniting the soul fire" of androids is completely absent in the book.

This technology is completely in the hands of the Steam Alliance, so only the Steam Alliance can create artificial humans.

On this day, Xia Zuo didn't go to class again, and read the two extremely heavy core books with Ray.

At night, after reading two books, Lei lay down and began to dissect in his consciousness the technology he had learned, which was the technology of the energy converter, and he needed to completely construct a new special energy converter in his consciousness that combined his own knowledge and the knowledge in the book, and only after arranging the structure diagram would he make it.

Xia Zuo slept later, because he hadn't even finished reading a book, and it wasn't until ten o'clock in the evening that Xia Zuo, who had finished reading "Android Configuration Breakdown" for a short time, closed the book and turned off the lights to sleep.

The night gradually fell silent.

On winter nights, the sky is cloudless, and although the moon is broken, the outside of the wooden house is not dark because the earth is white and reflective.

Squeak!

The sound of footsteps on the snow, in the distance of the forest outside Natsusaki's house, a figure appeared out of thin air, disappeared again like a dream, and the next moment, it appeared outside the back window of Natsusaki's house.

The white palm with scarlet nails slowly pushed open Xia Zuo's back window, silently.

The red-cloaked figure jumped up, equally silent, and turned to look at the sleeping Natsuzo.

"Little one, I've finally found you. Eve, the vampire baron who had a good time with Xia Zuo and was later beaten away by the wolf girl Adele, licked her scarlet lips, couldn't hide her excitement, and smiled and showed her sharp fangs.

"Whew!" A black breath was gently exhaled by Eve, swirling around the room, covering Xia Zuo's face, and slowly penetrating.

The rhythm of Natsuzo's breathing immediately changed, becoming slower and calmer.

Eve jumped into the room with confidence, landed silently like a cat, and floated to the side like a ghost, picking up Natsuzo horizontally, turning her body into a black silhouette, and a moment later, she appeared outside the forest behind the wooden house.

This seems to be a special ability that makes Eve resemble a ghost.

Holding Xia Zuo, Eve gradually moved towards the depths of the forest, there were too many strong people in the Royal Academy, and Eve had to be careful, not even daring to make any certain noise.

And just as Eve had just disappeared into the wooden house, Xia Zuo's bunk was underneath, and in the darkness, bright eyes lit up.