Marin was very depressed at the thought that the four particularly large territories of the Kingdom of Bohemia, the Kingdom of Hungary, the Duchy of Silesia, and the Duchy of Moravia were about to lose to him.

In the evening, Marin tossed Angela hard and asked for a few times. Angela pestered Marin breathlessly after finishing and asked suspiciously:

"Honey, why are you so excited today? Almost tossed people to death......"

Marin didn't hide it from him and said what he thought. When Angela heard this, her eyes lit up a little. You know, that's four very large countries. Moreover, the Kingdom of Bohemia was the first of the four secular electors of the Holy Roman Empire.

So, Angela's eyes lit up and said:

"Why don't we marry Caesar and Anne of Bohemia? That's the King of Bohemia! After that, he will be an elector! ”

Marin shook his head, not to mention that the Kingdom of Hungary was a powder keg region. Just because it is not close to the sea, it is not suitable for the development of great navigation, and it is far worse than that of Britain.

Moreover, its territory is only separated from Britain by the North Sea, and it is not far away. If you get the Kingdom of Bohemia, the Kingdom of Hungary, Silesia, and Moravia, not to mention the war-torn problem there, it is too far away from East Friesland, separated by thousands of mountains and rivers, and it is difficult to manage, and it is also a big problem.

However, Marin did not tell Angela about the British plan, so as to avoid Angela being lax and accidentally saying it.

Then, Angela felt that it would be a good idea to let her second son become a king and elector of Bohemia. So, she took the initiative to pounce and entangled Marin......

Marin said with a smile:

"It's impossible for a woman to get pregnant. Because, with your mouth facing down, the liquid flows straight out. ”

"Then you go up and down, I want to have another son, and I will be the king and elector of Bohemia!" Angela said stubbornly.

Marin was speechless, but he still pressed it very embarrassed......

The next morning, Marin felt a sore back and a terrible deficit. He rubbed his waist and muttered:

"No wonder the emperors of China died early, Kang Mazi has been the emperor for 61 years, which is considered to be a long reign. And that's because he ascended the throne at the age of 8......"

"Huh...... No, his grandson Qianlong is also very prodigal, not only there are a bunch of them in the palace, but there are also Rong Mama (Xia Yuhe) gods and horses on the shore of Daming Lake outside...... Why did he live to be 89 years old? Could it be that he has an ancestral secret recipe? Well, I still have to send someone to Da Ming to find such an ancestral secret recipe......"

Anyway, Marin found that after he crossed over, his body had not been strengthened except for better brain memory. You can't beat ten at a time, and you can't count women in one night......

In short, he is still in normal health. It's just that under long-term training in martial arts, the body is stronger than the average person. As a normal man, if you have too many nights, you will inevitably have back pain and your steps will be vain......

Rubbing his waist, he stepped on the "space step" (not MJ's dancing space step, but Armstrong's light space step, which looks like a stumbling step, an authentic space step...... Marin went to his office in the forecourt of the palace and began to work on the urgent papers......

Soon after, Jeffrey suddenly came to Marin's office and invited him to attend the completion ceremony of the road......

"Road completion ceremony? Do you want me to participate in such a trivial matter? Marin was surprised.

Jeffrey was actually a little surprised, so he asked rhetorically:

"Lord Duke, didn't you ask me to pay special attention to the construction of that volcanic ash (cement) road?"

"Volcanic ash?" Marin was stunned for a moment, and then suddenly reacted:

"It turned out to be a concrete road...... Okay, I'll go at once, and you go and prepare the carriage and the guards!" ”

Soon, the four-wheeled spring-loaded carriage was ready, and Marlin and Jeffrey got into the highly protective carriage outside the carriage, which was filled with tinplate. And around the carriage, there were fierce guards in chest armor.

Guarded by a large number of guards, Marin's carriage soon reached the edge of the concrete road outside the north gate......

After getting out of the car, what Ma Lin saw was a neat and flat rural cement road, which was similar to the cement road in Ma Lin's hometown in later generations.

It is a standard country concrete road with a width of 3.5 meters and a thickness of 20 centimeters. Moreover, on the concrete pavement, Marin has people cut every few meters, supposedly to prevent the pavement from swelling or drying out.

In fact, the fly ash cement used for marlin paving cement road is a cement variety with a low expansion coefficient and good crack resistance. It's also thanks to Marin that he has built a salt boiling base, otherwise, there wouldn't be so much fly ash supply. In later generations, ordinary cement roads used the simplest Portland cement. Only reservoirs, coastal defense, river defense and other projects will use fly ash cement with good waterproof and anti-corrosion performance.

The road is paved with fly ash cement, and it is a rural cement road that is only 3.5 meters wide, and it is possible to do it without cutting knives. Of course, it is better after the cutter.

In addition, the cement pavement is not smooth. Otherwise, on a rainy day, people can "skate" on the concrete pavement. On the cement pavement, the construction personnel used thin lines to play many shallow bars. Although the depth is very shallow, the friction coefficient of the cement pavement is increased a lot, but the friction is not high compared to the dirt road. The most important thing is that with this shallow "bar", even if it rains, the cement pavement will not be slippery.

In fact, the cement road was repaired more than a month ago. It's just that the cement pavement needs to be air-dried. Therefore, I waited for more than a month, and when the cement pavement was completely dry and hard, I invited Jeffrey to accept it.

Jeffrey remembered that Marlin had said that this path was very important and that he should follow it personally. Obviously, this road is very important to Marin, so he invited Marin to attend the completion ceremony of the road. Well, this kind of ceremony was also "invented" by Marin......

The so-called road completion ceremony is actually to let Marin unveil the plaque, and then personally ride a horse-drawn carriage to run back and forth on the road.

Marin happily let his carriage get on this small cement road, which is just over 3 kilometers long......

After getting on the concrete road, the carriage quickly accelerated. On such a flat concrete road, the carriage ran fast. Later, after the speed of the car increased, the horse basically did not need to use too much force, and directly galloped on the road by inertia. Even the horses tried to stop, but they were pushed forward by the carriage behind......

If the horse pulling the cart could speak, the horse would have said:

"Mother Xipi, I can't stop at all!"

The horse ran desperately, and if it slowed down, the carriage behind it was still pushing the horse forward, as if not letting the horse slow down, which made the horse very depressed, so he kept running. Fortunately, under inertia, the horse did not pull the cart too hard at this time. Unlike those mountain roads with high resistance, if the horse is not pulled, the car cannot move.

Soon, more than three kilometers of concrete roads came to an end. However, at this time, the speed of the horses and the carriage reached a very high value. The horses tried to stop, but they were held back by the carriage and continued to move forward......

Fortunately, the carriages of Europe have brakes. The driver saw that the road was coming to an end and quickly braked manually. The brakes are on the left, a simple lever principle - the front is a long arm, which extends to the left hand side of the driver's side. And in the back is a short arm, with a lot of friction attached to the top. There is no rubber at the moment, and the friction is made of leather.

The driver raised his long arm with his left hand, and the leather friction pad leaned on the wheel, rubbing against the wheel, trying to stop the wheel by friction. However, unlike the brake pads of later generations, which are on the inside of the rim, the brake pads at this time are really on the outside of the wheels, and the friction is also on the outside of the wheels......

At the same time, the coachman's right hand began to pull the reins, and the horses stopped......

It's a pity that this time the carriage was running too fast, not only because of the inertia, but also because of the inertia, there was a very harsh brake sound - no way, who told the carriage to be too fast......

Luckily, there are no lakes and cliffs ahead. Some distance after the dirt road, the carriage really stopped. The coachman was so frightened that he repeatedly pleaded guilty to Marin, after all, this was a serious mistake.

Marin did not blame the driver, because he knew that people in this era underestimated the convenience of cement roads. So, if something goes wrong, it's nothing. Besides, I didn't have any problems.

At this time, Marin's attention was completely attracted by this rural cement road that was hundreds of years ahead of its time. Just now, he clearly felt that the carriage was throwing at the highest speed ever. Although it can't catch up with the cars of later generations, it will definitely be able to catch up with the battery car. In his previous life, Marlin rode that second-hand battery car and was able to pull up to 26 yards. This time, the carriage was on a concrete road, almost running at the speed of an electric bicycle.

And in this era, even on the relatively flat Roman roads, horse-drawn carriages rarely exceeded 20 km/h. That's because there are uneven areas between the stones on the Roman road, which increases friction and causes small vibrations in the carriages. Therefore, the speed of horse-drawn carriages generally does not exceed 20 kilometers per hour. Of course, if you encounter a Ferrari-level pull horse and run hard, you can also break through this speed, but it is rare.

But on the concrete roads in the countryside, even ordinary horse-drawn carriages can easily run at speeds of more than 20 kilometers per hour. The only problem is the brakes.

Marin intends to have people study the simple foot brake system in the future, so that the coachman will not brake with his left hand and pull the reins with his right hand, and the result will not be good on both sides......

Moreover, Marin found that after running down the 3-kilometer road, the horse pulling the cart was not tired at all, and he was still very energetic.

It is no wonder that on the cement road, after the speed of the carriage is raised, the inertia of the carriage, coupled with the small friction coefficient of the road surface, makes the force required for the horse to pull the carriage much smaller. On the contrary, when horses want to slow down, they are often pushed forward by the inertia of the carriage. Therefore, horses pulling carts and walking on concrete roads save a lot of effort than on dirt roads and cross roads. In this way, the carriage continues to travel much longer distances than on other road surfaces. In this way, the average distance traveled by the carriage every day will also increase a lot. Even, reaching twice is not a myth.

An ordinary horse-drawn carriage can run 100 kilometers a day on ordinary roads, which is amazing. Because, after the carriage has been running for an hour, it has to stop and rest. Not to give rest, but to rest. Otherwise, the horses will die of exhaustion. In ancient Roman times, on the Roman road, stagecoaches could only run 160 kilometers in 24 hours, and they had to rest and change horses in the middle of the way. Otherwise, the horses will not be able to bear it.

On the concrete road, the horses pulling the cart have less effort, and the rest period becomes longer, so they can naturally run farther. If the horse's physical fitness is better, it is not a myth to drag a carriage 200 kilometers a day on a concrete road...... If it's a two-horse carriage, it should be faster. Of course, this is a car carrying people, and it is not difficult to pull a horse. If you have a heavy load, the speed is much slower...... After all, the pull of the horse is nowhere near as strong as the machine...... The average sedan has more than 100 horsepower, which can withstand hundreds of horses......