What kind of ice is the ice in the skating rink?
The ice in the skating rink mainly had the following conditions: 1. ** Early situation **: In the early days, ice was made from pure water, but there were problems with the use of pure water ice, such as scratches caused by blade friction, damage to the firmness of the ice surface, and so on. Later, there were ice-skating rinks that added milk to the water. The milk was oily and softer than ice after freezing. It increased the elasticity and crack resistance of the ice surface, reducing scratches and post-maintenance. As the ice-skating rink moved from outdoor to indoor, in order to solve the problems of aesthetics and meet the requirements of the competition, it would also use methods such as removing air bubbles in the ice layer, laying white ice paint, and adding milk to form a white, beautiful, safe and durable indoor ice-skating rink. However, some professional ice-skating rinks no longer used this "milk technology." 2. ** Current situation ** - ** indoor ice skating rink (real ice)**: Generally made of tap water. First, build an ice-skating rink of the required size, install a cooling pipe under the field and connect it to a large refrigerator outside. After injecting tap water, turn on the cooling equipment, and let the tap water cool down to below 0 degrees Celsius to condense into ice cubes, finally forming an ice surface. If the ice surface was used too many times and uneven scratches appeared, there would be specialized personnel to maintain it and add water to form a smooth ice surface. This method of making ice required a high capital cost, and the tickets were relatively expensive. - ** Ice-skating Rink **: The material is high-molecular-weight graphene, which is formed by the condensation of ethene and butadien under the effect of a catalyst. The average molecular weight is greater than 2 million. This material had good comprehensive properties and could work at-269 to +80 ° C for a long time. Its surface was smooth and the ground was flat. It was almost the same as the real ice experience and the cost was low, so most ice rinks would use it. 3. ** Ice rinks in large-scale events (such as the Winter Olympics)**: Advanced technology was used. For example, the 2022 Beijing Winter Olympics used carbon dioxide transcritical direct cooling technology. The ice maker first made a base ice 8 - 10 mm thick, then mixed the white paint with pure water, slowly and evenly sprayed it onto the ice surface, freezing the white paint to form a "milk" ice surface.(This is not really adding milk, but it has a similar effect.) The principle of this technology was similar to that of a refrigerator, but it could accurately control the temperature difference on the ice surface to not exceed 0.5 ° C. With pure water sprayed layer by layer on the ice surface, the ice surface would become stronger. The excess heat during the cooling process could also be used elsewhere, taking into account safety and environmental protection. 4. ** Ice surface treatment during ice filling **: In events such as figure skating, warm water of 40 ° C to 50 ° C is usually poured into the ice arena and frozen. This can melt the surface of the ice and then slowly cool it down to ensure that the ice layer is complete and smooth. Because using ice water would easily affect the fragility of the ice, which was not conducive to the game. Curling, on the other hand, would spray water onto the ice during the game, deliberately creating small particles to increase friction. While watching the Olympics, you can also read the wonderful novels related to the Olympics!
Immortal Blood TLV Mobile E-book download
Immortal Blood's TLV version can be read and downloaded on the Elite novel website. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Front English
The English word for " front " was " front "," alignment ", or " line of battle ". " Arcs of Fire " is equally exciting. Everyone is welcome to click and read it!
Loving you is brilliant and lonely
The latest chapter of "Love You Brilliant and Lonely" is chapter 75. It's All Happiness (2023 - 10 - 26). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the English movie clips about horror?
Here are some English clips from horror movies: - "So what brings you down then?" Why are you here? I'm studying, London College of Fashion. (I came to the London College of Fashion to study.) Room is on the top floor. (The room is on the top floor.) It's perfe... (Perfect.) Last night, I saw something... in my dreams. (Last night, I saw something in my dream.) There was a girl. (There is a girl.) And you are? Sandy. (And you are? Sandy.) I've got this kind of gift. I can see people, places... things others can't. (I have this talent. I can see people and places that others can't.) This is the closest most people ever get to their dreams. (This is the moment when most people are closest to their dreams.) They're not just dreams. (But that was not just a dream.) Jack, I don't want to do this. (Jack, I don't want to do this.) You think you can just walk away? (Do you think you can just walk away?) It really happened. (It really happened.) What did you see? (What do you see?) Do you believe in ghosts? Do you believe in ghosts? I want to report a murder. (I want to report a murder.) You witnessed the murder last night, but you believe this was a vision from the past? (You witnessed the murder last night, but you think it's an illusion from the past?) The guy that killed her is still out there. I have to stop him. (The person who killed her is still at large. I had to stop him.) Where you going? (Where are you going?) I know what you did. (I know what you did.) I've done a lot of things. You're gonna have to be more specific, love. (I've done many things. You'll have to be more specific, dear.) You can't save me. Sandy! You can't save me. Sandy!" Wait for the footage. - "A little boy here and a little boy there, here a boy there, a boy everywhere a boy." hello Danny，I've been waiting for you，we've all been waiting for you。”Such a scene. - In a horror movie, there was a phrase,"Help!" I'm lost in here! (Help! I'm lost! Did you hear that? Is someone out there? (Did you hear that? Is there someone outside? Help me! Help me! (Save me! Save me!) Cal? Becky? (Carl? Becky?) Something's not right about this. I think we should head back to the road. (Something's not right. I think we should go back to the main road.) Becky? Travis? Who are you? What's going on? (Becky? Travice? Who are you? What's going on?) I came looking for you. What? (I'm here to see you. (What?) How did you get here before us? I don't know. How did you get here before us? I don't know.) My boy, he's lost in here too. (My son also went missing here.) This is nuts. It's only a field. What's happening? He went the other way. (Ridiculous. This was just a patch of grass. What happened? He went in the opposite direction.) I'm never going to find her. (I'll never find her.) You can find things. But it's easier once they're dead. (You can find it. But dead things are easier to find.) How long have we been here? (How long have we been here?) I'm not sure. Don't let Cal... (I'm not sure. Don't let Carl…) That sounded like me. (It sounds like my voice.) This Field " <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
I became an official of a hundred households
"In the Ming Dynasty, Baihu was a sixth-grade official. The 100-man army is under the command of the 120-man army. If one became a hundred household officer, they would enter the middle level of the Jinyiwei system. Below them were the general flag (seventh grade), small flag (seventh grade) and other basic personnel. Above them were the thousand household (fifth grade), deputy thousand household (fifth grade) and other official positions. As a centurion, he had a certain status in the official system. At the same time, he also bore the corresponding responsibilities and missions. For example, he had to manage the soldiers under his command in the military. The novel "The Unorthodox Great Ming" is equally exciting. Everyone is welcome to click and read it! "
There are no idioms in the world
The four-character idioms related to "victory" were: competent and happy, winning and studying for ten years, winning and losing are common in military strategists, winning and killing, winning without arrogance, losing without hunger, winning friends like clouds, winning in the palm of one's hand, winning and losing the common in military strategists, winning and losing by a notch, etc. The novel " Glittering Four Seasons " is equally exciting. Everyone is welcome to click and read it!
Sword Dynasty e-book txx
You can enter " Sword Dynasty txt-download " through the search engine to obtain the e-book txt-resources of " Sword Dynasty ", but you need to pay attention to the legitimacy and security of the source. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Deciding whether to let go or to be conservative
Decide whether to be liberal or conservative. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Twelve Zodiacs III
The third work named " Twelve Zodiacs " mentioned in the reference materials was " The Twelve Zodiacs of Heavenly Secrets ", which was starred by Song Wenzuo and Hu Yixuan. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
Will you lose money by planting white ginseng fungus?
From the information he had so far, the white ginseng fungus had many advantages, making it more profitable to grow. For example, in Mijialu Village, Leqiu Township, Nanjian County, Dali County, Yunnan Province, the "agriculture and light complementation" model was adopted. Nine greenhouses of 75 square meters (about 1 mu of land) were planted. Each greenhouse put four white ginseng fungi a year. The income of each harvest was 20,000 yuan, and the annual income could reach 720,000 yuan. There was also a white ginseng planting base in Xinwu Village, Gaocheng Town, Sui County, Hubei Province. It could be harvested three times a year. The first batch of dried white ginseng fungus could be harvested more than 10,000 catties, and each catty could be sold for 40 yuan. The first batch could earn more than 400,000 yuan. The planting cycle of the white ginseng fungus was short. It only took 16 - 20 days from the incubation to harvesting, and it could quickly reap the benefits. The planting technique was simple and easy to understand. It could be planted in ordinary farmhouse courtyards with ventilation doors and windows. If it was planted in a greenhouse, a simple shelf could be built. The raw materials such as cottonseed hulls, sawdust, and crushed corn cobs were common in rural areas. The cost was relatively low, and the hypnosis grew fast, had strong resistance to impurities, and produced mushrooms earlier. In addition, as people's pursuit of healthy diet increased, the white ginseng fungus was rich in nutrients and had a unique taste. It was gradually favored by the market. The market potential was great, and the supply was in short supply. However, this did not mean that planting white ginseng fungi would never lose money. If there were natural disasters, serious pests, sudden major changes in the market (such as a large number of similar products competing or a sudden change in consumer preferences, etc.) during the planting process, they might also face the risk of losses. "Life Like a White Birch" is equally exciting. Everyone is welcome to click and read it!