I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

Liu Tan looked Lu Xuan up and down and thought for a while before saying, "I remember, you should be able to swim, right?"

Lu Xuan said calmly: "Yes."

Liu Tan asked, "Then what do you wear when swimming?"

Lu Xuan was inexplicable: "Not wearing it."

Liu Tan:? ? ? ? ? ! ! ! ! !

He looked at Lu Xuan with broad shoulders, slender waist and long legs, and imagined that scene again, and couldn't help but dry his throat, and suddenly understood Lu Xuan's thoughts just now.

Lu Xuan saw his surprised face, eyes widened, couldn't help leaning over and asked in a low voice: "What about you?"

Liu Tan didn't react for a while, and asked in a daze, "What?"

Lu Xuan hugged his waist and asked: "What will you wear when you go into the water? Water depends?"

Liu Tan came back to his senses, blinked for a while before blushing, and choked out a sentence: "I won't."

This is not fake, he really doesn't know how to do it. In his last life, he lived in an area that never crossed the north-south dividing line from childhood to adulthood.

He didn't receive the memory of this body, so he was so busy that he forgot about it.

Lu Xuan was stunned for a moment, then said with a chuckle: "It's okay, do you want to learn? I'll teach you?"

Liu Tan said melancholy: "How can there be that time? Forget it, if you don't, you won't. Anyway, I don't need me to go into the water with Father."

Lu Xuan was a little disappointed. He thought he could teach Liu how to swim and do some unspeakable things by the way, but now it seems that he has no chance.

Seeing that he was silent with downcast eyes, Liu Tan couldn't help coughing lightly and said, "Wait for my father to return to Chang'an."

After hearing this, Lu Xuan immediately raised his head, his dark green eyes were full of sunshine, he fixedly looked at him and asked, "Then... when?"

Liu Tan thought for a while: "It seems to be at least two months later, and the summer must be spent."

Lu Xuan: ...

Let alone two months, he may be returning to Wusun in one month!

Seeing Lu Xuan lowering his head in disappointment, Liu Tan felt it was amused, leaned over and kissed him proactively, just as he was about to make a joke, Lu Xuan grabbed the back of his head and gave him a deep kiss that almost made him hypoxic.

After they parted, Lu Xuan hugged Liu Tan and stroked his back softly, "You haven't said anything about it yet."

Liu Tan was so dizzy when he heard this sentence that he came back to his senses, and said in a hoarse voice, "It's just clothes made of fish skin, so it can swim more smoothly in the water."

Clothes made of fish skin...

Well, Lu Xuan finally knew why he hadn't heard of it before, such a thing is in Wusun... Let alone Wusun, it is impossible to have it in the Western Regions.

Every country basically relies on oases to build. There are water sources, but they are limited, and fish are even more limited. It is impossible to use a large amount of fish skin as a water source.

This also proves how extensive the resources of the big man are, and it is no wonder that the Xiongnu have the idea of ​​​​beating the big man all day long.

However, Lu Xuan did remind Liu Tan that he thought he had already considered most of the problems before, but he forgot about the matter of relying on water.

Liu Che was on a northern tour this time, and he didn't plan to go to the east, so he probably wouldn't think about the issue of getting into the water.

Although he didn't know if Liu Che would get into the water when he went to the east in the past, but no matter what, he couldn't write to Liu Che to ask Liu Che to bring his swimsuit.

So after much deliberation, he simply asked someone to prepare the water.

In fact, Liu Tan knew about such a thing as water support, but he had never seen it before, so after ordering the people below to start preparing the water support, he found a set and prepared to study it.

After taking it up, he found that it was very similar to the diving suit of later generations, but because of the material problem, it may not be so close to the body, and it is not so soft, and the stretching performance is not good, but for this era, it is already very good. .

Lu Xuan turned around the water bed curiously, reached out his hand to touch it, then tentatively picked up his sleeve and stretched his arm inside.

Seeing his action, Liu Tan couldn't help asking: "What are you doing? Want to try? Then you have to take off your clothes."

Lu Xuan shook his head and said: "No, I just think it's too inconvenient to swim wearing this, right? It's not that it's inconvenient in the water, but it's troublesome to put on and take off."

Liu Tan looked at Shui Keo for a while and said, "Maybe...it can be improved."

Lu Xuan asked with some puzzlement: "How to improve?"

Liu Tan didn't say anything, just drew a picture and asked the people below to do it.

Lu Xuan took a look and was stunned for a moment: "Square? What is this?"

Liu Tan said seriously: "Swimming trunks!"

Although there is no such material as later generations, it is also possible to use fish skin.

This can not only avoid the troublesome problem of putting on and taking off the water, but also avoid the embarrassment of walking birds in public from the emperor to the ministers.

Even though Liu Che didn't care, Liu Tan felt that the picture might be a bit of an eyesore.

Moreover, it would be safer to ride the slides while wearing swimming trunks, otherwise you would have to wear clothes, and it would be very uncomfortable if the clothes were wet and stuck to your body.

This thing is not considered an invention in Liu Tan's place, it is basically just an order.

It has to be said that he allowed this to indirectly save the craftsmen who made the water tank. After all, it takes a certain amount of time to make a complete water tank, and exact body data is also required.

The most important thing is that Liu Tan needs a lot of sets. In addition to reserving the sets for those people brought by Liu Che, he also needs to get some spare sets. What if something unexpected happens?

Swimming trunks are much more convenient, and do not require too detailed data.

After Liu Tan ordered to go down, he looked at his schedule and found that there was nothing he needed to be busy recently, so he planned to take a break from his busy schedule to spend two days with Lu Xuan, and the two of them hadn't seen each other for several months.

And this time Lu Xuan came here to meet before the expedition. In the next time, unless the war is over, there should be no time to come here.

After Liu Che came, the two of them must not have much time to spend alone together, so they can only sneak in now.

As a result, after two days of leisure with Lu Xuan, Gongshu also approached him.

Gongshu also looked at Liu Tan eagerly and said, "Your Highness, the tree house has already started to be built, but there is a problem that has not been resolved."

Liu Tan squeezed Lu Xuan's hand back and forth under the cover of his sleeve and asked with a serious expression, "What's the problem?"

Gongshu also said: "Illumination, candles or oil lamps can be used inside the tree house, but if you use lanterns outside, in case of fire..."

Liu Tan was stunned for a moment, and then said: "You don't have to worry about this, I ordered someone to make some glass lamps."

He overlooked this. It is indeed a bit dangerous to start a fire in the woods. Although it is humid in summer, the northern border country is dry, and there must be a lot of flammable materials around the tree house, so fire-fighting facilities must be done well.

Liu Tan puts the issue of fire protection on the agenda, but most of the fire protection these days is to set up water tanks. Once a fire is found, the water is taken from the nearest water tank.

It's just that after Liu Tan got to know it, he found that the fire extinguishing methods in this era seemed to be relatively backward, and the thing like the pump hadn't appeared yet. Thinking about it carefully, it probably wouldn't appear until the Ming and Qing Dynasties.

After looking at the schedule and doing some calculations, Liu Tan decided to ask the craftsmen to work overtime to get some pumps out.

The pump is divided into the Chazi pump and the Western pump. The Chazi pump is a local pump. The whole shape is more like a water gun, with a sleeve on the outside and a piston inside. The sleeve is put into the water tank to absorb water through the piston, and then Extinguish fire against burning area.

The water absorption capacity of the chazi pump is not large, and the shooting range is also limited. The only advantage is probably that it is portable.

The western pump can be regarded as an evolved version of the chazi pump, which is semi-mechanical.

The western pump is composed of a water tank, two water suction cylinders, two water outlet cylinders, pressure beams and the main outlet pipe. There is still a piston in the water suction cylinder, while the water outlet cylinder can rotate flexibly and can adapt to any position.

When in use, the pressure beam is lifted up and pressed down. This pressure beam controls the piston in the water suction cylinder. When it is lifted, the piston retreats, and the water suction cylinder absorbs water. When it is pressed down, the piston is pushed back, and the water is pushed in and out. The water canister sprays out.

This mechanism is difficult to say, easy to say, the most important thing is the production of the piston.

If it is a later generation, it goes without saying that the piston must be sealed with rubber, but in the current situation, Liu Tan had no choice but to call Gong Shucan over to ask him what he thought.

After seeing it, Gong Shucan smiled and said, "Your Highness, don't worry, just use beef tendon."

"Huh?" Liu Tan was a little surprised: "Beef tendon?"

Gongshucan said seriously: "That's right, our Gongshu family has also researched the piston. It is carved into a circular shape with wood, and two grooves are dug out on the head, and then filled with beef tendon, which can play a sealing role."

Liu Tan imagined it for a while, and felt that there was nothing wrong with it, then handed him the blueprint and said, "These two are my newly researched excitation tubes, let's see if I can make them."

Gong Shucan's face was full of question marks: "The pump? What... what is it for?"

"Extinguishing."

Liu Tan thinks that it would be very useful if the pump can be made. Weiyang Palace is also made of wood, or the current palace is all of wood. If there is a fire, it will definitely be a disaster. Think about the Boliang that was burned before. Taiwan, Liu Che felt so distressed at that time.

In fact, the fire at Bailiangtai seemed to be just an accident, and the fire was not big at first, but because of the low efficiency of fire fighting, Bailiangtai was directly burned.

The emperor's team dedicated to extinguishing the fire must be the most efficient. If this is the case, it will not be saved. It can only be said that the tools are outdated.

Now that there is a pump, not to mention that it can extinguish the fire 100%, but at least it can be rescued.

But Gong Shucan felt that he really couldn't understand the brain circuit of His Royal Highness the King of the Northern Realm. How did he jump from the elevator to the fire extinguishing device?

But the boss ordered, and he will do it.

This problem was not a problem for Liu Tan. After drawing the drawings, he began to seriously think about another thing-glass lamps.

When I gave Lu Xuan a gift before, the underwater glass lamps were all made of glass panels, with a waterproof coating in the middle, but this is too inefficient and the shapes that can be made are limited.

Feeling that glass has developed to a certain level now, he thought, he can let the craftsmen go to the next stage - glass blowing.