af Yipeng Yuan 5 år siden
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After the First World War, with the popularity of highways, most of the agricultural tools were gradually replaced by diesel engines. Among them are horse-drawn carriages, which become trucks.
It can makes the large projects reduce transportation costs.
It brings convenience to people in the recovery of the war.
One can have a large cargo carrier that provides medium to short haul transport.
As people's lives have been greatly improved, people are pursuing more efficiency. At this time, many large airport products are sold in the world.
In the 1930s, there were planes flying directly from New York to Berlin, Germany. It has provided convenience to many people. It took a week to get to the destination. This type of flight has greatly shortened the time.
After the end of World War I, a large number of idle aircraft were modified and sold at low prices into the civilian market. Although it led to economic losses in the civilian market.
On August 25, 1934, Farnsworth first demonstrated to the world a complete all-electronic television system at the Franklin Institute in Philadelphia, Pennsylvania. Farnsworth is the first system to integrate an electronically scanned television camera with an electronically scanned television receiver to provide live, dynamic, and black-and-white images.
This made the already very rare and expensive TV sets universal. In World War II, most cities in the United States already have independent television stations.
The invention of television, compared to the radio, allows people to relax while watching and listening to both sensory systems.
In 1928, the first washing machine with stable performance, low power consumption and high washing degree was introduced by Siemens of Germany. This is the drum type washing machine. In 1930, he was introduced to Canada. Until today, drum type washing machines are still commonly used.
The drum type washing machine that appeared in 1928 has two steps of washing and dehydrating. And the wash is cleaner. Reduced steps and increased efficiency.
In 1929, in order to develop a less dangerous refrigeration method, a refrigerant such as Freon was discovered, which became the standard for almost all domestic refrigerators.
The refrigerator allows people to feel the feeling of winter in the summer. It also allows some ingredients to be retained for a longer period of time. Help people find a refreshing and fresh feeling.
Coca Cola
Later, people discovered that this is the prototype of heroin.
It can make people excited and a small amount can cure cough. But this substance has an amazing paralysis effect and was once an addictive thing. .
Before 1930, Coca-Cola's ingredients contained a food additive called "cocaine".
Soldiers who were injured during the war became the first person to develop morphine addiction and morphine dependence, nicknamed "The Warrior's Disease." Increasingly, morphine is injected using a hypodermic needle.
Morphine is an anesthetic or sedative. It can alleviate the pain of people who are immersed in pain. The phrenic nerve achieves the effect of relieving pain. Played a decisive role in medical surgery.
In 1928, British scientist Fleming first discovered penicillin in experimental research. However, due to the lack of advanced technology and deep understanding, Fleming did not separate penicillin alone.
Penicillin also makes surgery, anesthesia, and blood transfusion possible under conditions of bacteria. To know this, saved hundreds of millions of people in World War II. Greatly reduced accidental death after surgery. It also makes some diseases that have been plaguing humans for many years no longer appear.
Through the understanding of penicillin, people have a deeper understanding and research on the principle of bacterial disease. Many drugs have been improved on the basis of the original, which greatly reduced the occurrence of adverse drug reactions. Become the greatest medicine of the 20th century.
Compared to other antibiotics, penicillin is stable and easy to use, relatively less adverse reactions, and a broader range of antibacterial. Finally, various synthetic, semi-synthetic penicillins have been used ever since.
Penicillin is not the most primitive antibiotic, but it is called the ancestor of antibiotics for the following reasons. .
Before the 1940s, humans have not been able to master a drug that can effectively treat bacterial infections with little side effects. At that time, if someone had tuberculosis, it would mean that this person would soon die.
Gradually increase the size of the artillery and the tonnage of the battleship to become a battleship.
They development of the tonnage of the strongest battleship of its own in the same fighting force has emerged: the pocket battleship.
After restraining Germany's biggest threat, the West began another round of arms race.
There is a saying in our army fan community that can describe the fleet at that time: peace is always within the range of artillery, and equality is only between tonnage.
This makes people regain their confidence and ambitions.
This allows the defeated country to plant the seeds of hatred and discrimination. This makes people regain their confidence and ambitions.
The submarine did not develop too fast in the primary stage. It is closer to increasing the volume, increasing the depth of the dive and increasing the speed of the underwater.
In general, between World War I and World War II, given the constraints of the Treaty of Versailles and the slow development of the Navy.
In the 1930s, heavy machine guns used in bunkers were common. But this time the Germans have combined the characteristics of light machine guns and heavy machine guns to create a universal machine gun.
Machine guns still occupy the position of decision-making war in today's army.
Machine guns, from invention to today, have not developed very rapidly.
Another group of opinions believes that tanks should be used together, using the three characteristics of the tank's firepower, protection and engine power as the main role of breakthrough and attack on the battlefield.
This 'branch' has gradually become mainstream, affecting until today.
One group's opinion is that the tank should be a system that supports the infantry. Therefore, it needs to be matched with the infantry unit's establishment and combat type, and is evenly distributed to the infantry unit to command and dispatch.
This view became the subject of ‘conservatives’. But the arrival of World War II soon confirmed the mistake of this view.
During the two wars, the use and formation of tanks has led to extensive research in various countries. The main research directions are roughly divided into two groups.
The gradual composition is the representative of the Conservative Party and the Innovative Party. The new concept of fighting also brings new tactics. It is good for people to work together.
Although the demand directions are different on these two main axes, they have the same effect on the same development trend, which is the requirement for streamlined design.
After the transformation of a large number of retired aircraft, it entered the civilian market, but it hit the original size of the market. This has caused a large number of small civil aircraft companies to close down.
The streamlined type is more beautiful than its original aircraft.
The streamlined shape of the aircraft makes the flight power more complete.
The other is the gradual growth of the passenger and freight market.
After the First World War, the combat aircraft depreciated a lot, and began to gradually modify civilian use and enter the civil aviation market.
one is the pursuit of speed, that is, the competition and rewards of various racing machines.
And lay the foundation for the arms race in various countries.
This can be changed in more time, allowing people to return to the state of life before World War I.
Slowed down the development of the defeated country Germany.
Almost all weapons have little effect on people's basic lives, but these weapons are still in use today.
