“Fancy outfits” by sea, land and air

   People working in various positions have specific labor protection clothing. For example: steel workers wear white asbestos clothing, which can prevent heat radiation and molten steel from burns; chemical plant workers wear clothes made of wool to prevent acid and alkali corrosion; radiologists wear bibs made of lead and rubber , Can prevent X-ray radiation…So what kind of clothes do people who work in the special environment of sea, land and air wear?
   Tanker’s “liquid-cooled suit” In
  
   summer, the outdoor temperature is as high as 40°C. Drivers sitting in the cab of a truck will be forced to breathe out by the heat emitted from the engine. As for the tankers in the tanks on duty or exercises in the deserts, swamps and plateau areas, they will be too hot. The temperature around the engine in the tank is sometimes as high as 70°C to 80°C, and the surface of the transmission device is also very hot. Although blocked by the heat shield, the temperature inside the car is much higher than that outside the car. What’s more, in order to defend against the enemy’s nuclear weapons and biological and chemical poisons, tankers must tightly close the lid of the turret. One can imagine how uncomfortable it would be for people to hold back in this stuffy, hot and airtight “fortress” in iron armor!
   Therefore, scientists have tried every means to deal with this kind of heat wave attack. When you are sweating on a hot day, wipe your face with cold water or take a bath. The water takes away part of the heat from the surface of the human body and people feel cool. Based on this principle, scientists have designed a “liquid-cooled suit.”
   In the inner layer of the “liquid cold clothing”, there are densely laid small pipes. The tanker wears it next to his body. When the water and alcohol mixture of the cooler flows through the pipe, the heat conduction effect will continuously take away the heat emitted by the human body. According to experiments, people wear this wonderful “liquid-cooled clothing”, even if they stay at a high temperature of 100°C for 4 hours, it doesn’t matter. “Liquid-cooled clothing” can not only improve the combat effectiveness of tankers in hot and humid environments, but also reduce the loss of water in tankers, greatly reducing the burden of water supply for logistics troops.
   The diver’s “Jim suit”
  
   Since ancient times, human beings have been yearning to dive into the beautiful and rich sea to observe the scenery and secrets of the seabed. However, the seawater has a huge pressure. The deeper the seawater, the higher the atmospheric pressure. The pressure will increase by 1 atmosphere for every 10 meters of depth increase. In addition, there are breathing problems under high pressure, nerve-wracking decompression sickness, etc., which greatly limit the depth of human diving.
   So, can we artificially create an environment the same as the ground pressure in the depths of the ocean? Yes, just wear this new “Jim” diving suit.
   The “Jim suit” is a bit like the spacesuit worn by astronauts. It is a tightly sealed shell made of high-pressure resistant magnesium alloy, weighing about 500 kg. Before entering the water, the diver enters the shell from the helmet that can be opened, then fastens the helmet and is sent to the seabed by the crane-type deep submersible. Even in the deep sea, the diving suit still maintains an atmosphere of 1 atmosphere. After completing the mission, the diver can return directly to the surface from the water without going through the decompression process.
   Some people may wonder whether the diver can move in this 500-kilogram suit? Please don’t forget that due to the buoyancy of water, the bulky “Jim suit” weighs only more than 20 kilograms in the sea. Therefore, divers wear it to work in the deep sea, whether they are raising their heads and feet or stretching their hands and arms, they are as easy as on the ground.
   Of course, pressure-resistant transparent materials must be used for different parts of the helmet, and several observation windows must be installed to facilitate divers to observe the surrounding area. In addition, divers can also use two multifunctional manipulators to help themselves complete underwater operations.
   The “Jim suit” has given a lot of credit to humans in the cause of exploring the ocean: once assisted divers in operations at a depth of 600 meters in the freezing Arctic Ocean, and found a lost TV cable at a depth of 400 meters in the Spanish sea. my country’s Bohai Oilfield has shown its talents in the exploration work. At present, the best “Jim suit” can work in deep water over 700 meters. A female oceanographer in the United States dived to a depth of 381.25 meters in the Pacific Ocean with the help of a “Jim suit”, setting a world record for the deepest dive for a woman.
   The pilot’s “anti-G suit”
  
   Modern high-speed fighter jets often perform sharp maneuvers such as dives, sharp turns, and somersaults during fierce air combat or aerobatics. When the aircraft makes a sharp flight of diving, pulling up and entering somersaults, the weight of the pilot can increase by 5-6 times, or even 7-8 times. At this time, the blood in the pilot’s body will rush to the feet, causing the blood volume of the lower body to increase suddenly. At the same time, the brain is severely ischemia, causing retinal anemia, causing the symptoms of “black vision” in aviation medicine, which is what is known in physics. Said the “overload phenomenon.”
   To reduce the impact of the overload phenomenon on the pilot, the way is to make the pilot wear a peculiar pair of trousers-“anti-G suit”, which will hinder the blood flow to the legs. What’s interesting is that the “anti-Dutch suit” was inspired by the giraffe.
   The giraffe’s head is more than 3 meters away from the heart. Needless to say, the pressure from the heart is high enough to transport blood to its brain. However, when the blood flows to its head, the blood pressure has dropped a lot, similar to the blood pressure of humans and most mammals. Strangely, when the giraffe lowers its head to drink, the blood pressure will naturally increase sharply because the head is much lower than the heart, but this tall animal has no symptoms of cerebral hemorrhage or rupture of blood vessels. Scientists have discovered that the secret is that the giraffe not only has a special “device” on its body, but it is also tightly wrapped in a thick layer of skin. When the head is lowered, this layer of skin will tightly hold the blood vessels to prevent a sudden increase in blood pressure.
   “Anti-G suit” is also known as “anti-G pants”. The commonly used bladder-style “anti-G suit” is composed of several airbags colluding with the abdomen, thighs, and calves. The airbags are connected to an automatic device. It is wrapped in a nylon cloth cover shaped like pants. Once the pilot has an overload reaction, the airbag will automatically inflate compressed air to pressurize the pilot’s abdomen and legs, slow down the flow of a large amount of blood to the lower part of the body, and facilitate the return of blood to the lower limbs, and prevent severe head ischemia. The magical “anti-Dutch suit” eliminated the pilot’s overload response, allowing them to fly safely in the blue sky.