After saying goodbye to Jim, Tianxuan embarks on another journey.

"Tianxuan, where are you going now?" Nicolas asked.

"I've already figured it out, let's go to Brentre first! It's the center of the world, and there's definitely something I'm interested in when I go back there. Tianxuan puffed out his cheeks and said with a smile.

"What do you think of Black Katy?" Nicolas asked, turning her head.

"I'm fine!"

"Good! Let's go to Brenthal! Nicolas folded her hands and said happily.

After deciding on their destination, the three of them immediately packed up and set off for Brentle.

After most of the day's journey, they arrived at the entrance to the new district of Brenthal.

"Just passing by here, let's go and meet Lower Bell!" Tianxuan proposed after the Wind Protector drove into the new area.

"Okay, no problem!" Black Katy then turned in the direction of the Wind Protector and headed for Bell's foundry.

When he came to the foundry room, Tianxuan pointed to the front and said with a smile, "It's still the same place here!" ”

"Hmmm! It's been like this for decades, and basically nothing has changed. Black Katy picked up the stubble as he operated, "Attention, we're almost there!" Sit tight! ”

"Okay!"

A few minutes later, the Wind Protector landed with a jolt! Then Tianxuan happily took Nicolas and Black Carty to meet Bell. Unfortunately, though, Bell wasn't in the foundry. It is said that he went to the 20th ring road in Wan'an District to repair the pipeline.

"It's a shame that Lord Bell isn't here!" Nicolas sighed.

"Why don't we go to the 20th Ring Road in Wan'an District?" Tianxuan pointed his finger to the sky and said.

"It's up to you! We're following you anyway! Black Katy said with a curl of her lips.

"Then I'm sorry for you!" Tianxuan arched his hands, squinted his eyes slightly, and thanked with a smile.

So, the three of them rode back on the Wind Protector. However, Nicos rushed to the console in front of Black Carty, blinked and said, "Black Carty, let me open it!" You've been driving for so long, it's time to take a break! ”

"Actually, it's out of the way!" Black Carty said with a smile after being stunned.

"Hmm!" Nicolas shook her head and said in a slightly coquettish tone, "No! I'm familiar with this place! ”

"Huh!" Hei Katy was stunned for a moment, then smiled faintly, walked over to Tianxuan and sat down.

Since the place where Bell is located is the outermost 20th Ring Road, although the distance is a bit far, the road is quite smooth. With the Wind Protector at full power, it took about 1 hour to get to the place where Bell repaired the pipes.

Speaking of which, Bell is really easy to find, because the pipeline is being repaired, so the surrounding area is closed. At this time, a group of people are busy on the machine.

So, after the three of Tianxuan docked the Wind Resistant, they walked to the construction site on foot.

Bell is also eye-catching, and his shape is also quite prominent among everyone, so Tianxuan saw it from afar.

"Hey! Mr. Bell! Don't come unharmed! Tianxuan waved his hand and shouted.

Bell, who was standing on a high ground, heard someone shouting to him, and hurriedly followed the voice. Seeing that it was Tianxuan, he immediately walked down with a smile and said, "Why did the acting city lord of Lanmian City come to me freely?" ”

"Huh? You still don't know? Tianxuan's eyes widened and he asked in surprise.

"Huh? What happened? Bell asked, frowning.

Tianxuan spread his hands and told Bell: "I am no longer the acting city lord!" The election is over, and Jim, the former lord of Redstone City, is now in charge. ”

"Oh!" Bell glared at this time, nodded, then shook his head, blushed slightly, and said, "Oops! Excuse me! I've been busy repairing pipes all over the place lately. That's why I didn't notice the news! ”

"It's fine!" Tianxuan shook his hand and said, "I look at this matter very calmly, and it doesn't matter if it doesn't work." ”

Bell smiled and applauded Tianxuan.

"Huh?" Tian Xuan hurriedly waved his hand and excused himself, "There is no need to praise this thing!" ”

"Good! Then it's over! Bell paused and asked, "By the way, why did you come to me?" ”

"Oh!" Tianxuan raised his head slightly and replied, "The world is so big, I want to go and see it!" I happened to pass by the foundry and heard that you were here, so I came to see it! ”

"I see!" Bell said with a smile.

"By the way, sir, what are you doing?" Tianxuan asked, pointing to the rows of pipes under the road.

Bell looked at Tianxuan and said, "Do you see three pipes with different colors but the same caliber?" That's a liquid pipeline that transports drinking water, wastewater, and reclaimed water. ”

"Three kinds of water?" Tianxuan asked, tilting his head.

"Hmm!" Bell nodded and explained, "Drinking water, needless to say, as the name suggests, can be directly quoted. ”

Tianxuan nodded in understanding.

Bell continued: "Wastewater is divided into domestic sewage and industrial wastewater. What we are overhauling now is domestic sewage, which is generated by bathing water and vegetable washing water in life; Industrial wastewater is only available in the new area, and a separate pipeline has been made to lead to Zhonghe City, so I won't introduce it here. ”

"Hmmm! I just wanted to ask about reclaimed water. Tianxuan said, staring at Bell.

"Okay! I'll explain to you: reclaimed water is treated domestic sewage. The water is treated at the Regeneration City, 40 kilometers outside Wan'an District. ”

"Regeneration City?" Tianxuan asked puzzled.

"That's right! That is true! The domestic sewage that has been simply treated is then transported from the regeneration city to be used for toilet and kitchen washing, agricultural irrigation, road cleaning, car washing, and supplementary water for cooling equipment. Bell said.

"Oh! So I get the idea! It turns out that this is what reclaimed water means. Tianxuan nodded deeply and said. However, tens of seconds later, he asked, "What are the other two calibers of pipes?" ”

"Hmmm! The thinnest pipes are gas pipes. It is used to deliver natural gas to every household! The other largest caliber is the material transportation pipeline. ”

"What is a material pipeline?" Speaking of this, Tianxuan's heart was full of doubts. At this time, he happened to see a number of people using mechanical assistants to put something similar to an iron ball into the largest diameter of the pipe, about 4 meters in diameter.

After seeing this scene, Tianxuan's eyes immediately widened, and he turned his head and asked, "Mr. Bell, isn't the material pipeline you mentioned used to transport solids!" ”

Bell smiled faintly and replied, "You're right, it's indeed used to transport solids." ”

"This ...... This...... How can it be? For such a thing, Tianxuan is also the first time to see it, and he still can't believe it, in the infinite brain supplement.

"You seem to be suspicious of this solid transport, huh?" Bell saw Tianxuan's thoughts and pointed out directly.

"Huh! Truly! Tianxuan blushed slightly and scratched the back of his head and said, "I'm really sorry, the first time I heard about it, it was hard to accept it for a while, please show it to me!" ”

After Bell finished speaking, Bell smiled blandly and said, "Okay, no problem!" You come with me! ”

"Hmm!" Tianxuan was about to follow Bell down to the ground, when he suddenly remembered Nicos and Black Katy, and said with a smile, "It's weird and dirty down there, why don't you two beauties stay on it!" ”

"Okay!" Nicolas folded her hands behind her back and sighed.

"Hmmm! You come back early. Black Katy said with his hands on his chest and a smile.

"Then I'll go!" After saying that, Tianxuan waved his hand to the two girls and followed Bell......

The underground urban pipe network is still very intricate, but it is also neatly arranged, and it is all gathered together, which is very convenient for maintenance. However, the material pipeline was 20 meters below the ground, so it took Tianxuan and Bell a little time to arrive by elevator.

After landing, Tianxuan couldn't wait to walk to the material pipeline to watch: I saw mechanical platform trucks constantly transporting large iron balls to the material pipeline.

"Huh? Why are the supplies all big iron balls? Tianxuan squeezed his brows and asked.

"It's not a big iron ball, it's a spherical sac." Bell explained.

"Spherical sacs?" Tianxuan was puzzled.

So, Bell took Tianxuan to a flat area. At this time, Tianxuan saw a group of people busy working, compressing and packing all kinds of materials, and then putting them into the hollow big iron ball he saw just now.

"Oh, I see, the spherical sac is like this, it's used to carry all kinds of supplies."

"That's right!"

"So why not use squares or other shapes?" Tianxuan asked.

"Spherical is the most suitable, unless we make a square or something else shaped pipe. The reason is that the square or other shape of the capsule is easy to collide and rub on the pipe wall during the pipeline transportation process, and after a long time, various problems will occur on the pipe wall and need to be repaired. ”

"Oh! I see! In this case, the use of a spherical capsule can greatly reduce the damage to the tube wall. Tianxuan glanced around and continued, "Even if it needs to be repaired, it's only this spherical sac." ”

Bell slapped his palm diagonally and said with a smile, "Yes, I can understand it so quickly." What you just said is the original intention of the material pipeline design. If you don't use balls for transportation, if the pipeline fails, it will have to be overhauled underground, and if it gets stuck, the pipeline will have to be broken. What's more, even if the broken place is repaired, it is difficult to restore it to its original state, and there is a great possibility that there will be another accident at the damage point in the future. ”

"Hmm!" Tianxuan nodded, smiled and said, "Now I understand!" I was so impressed by the Mayan engineer's craftsmanship that it was perfect. ”

"Nope! Not perfect! Bell shook his head lightly in disapproval.

"Huh? Is there anything better? Tianxuan raised his head and asked with his mouth wide open.

"That's not what it meant!" Bell cleared his throat and said, "There is nothing perfect in the world, our purpose is that there is no best, only better!" Otherwise, the thinking will be rigid, and it will stay in this bottleneck forever and cannot be broken through! ”

"Hmmm! What the gentleman taught me is that I took it to heart! Tianxuan nodded solemnly......

Read the first book of the novel