The hook is still the hookIt should be "hook". In ancient poems and related literature records, such as Tang Li Pei's poem "The Convergence of the Four Rivers":"The envy is not over yet, and the hook is about to hang down by the water." The second poem of Gu Yanwu's "On the River" of Qing Dynasty: "The river wind blows the echo, and the hook fish does not go up." They all used the writing method of "hanging hook", which had the meaning of fishing, and also the meaning of wood not being kneaded and curved (in ancient times, it was often attached to the auspicious sign of peace).
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Why is the hook bar called hook barGoulan originally referred to railings, which originated in the Tang Dynasty. In the Tang Dynasty, balustrades were related to singing and dancing. Li Shangyin mentioned in his "Poetry of the Provost" that "curtains were light and curtains were heavy." After the Ming Dynasty, brothels were also known as brothels. In the Northern Song Dynasty, due to the expansion of the citizen class and the increase in the demand for cultural entertainment, the "hook bar" appeared. Goulan was a performance studio set up in the Song Dynasty, which could also be understood as a theater at that time. Goulan was a stage for commercial performances. Every day, there would be various performances, including miscellaneous plays, funny plays, storytelling, banter, singing and dancing, puppet shows, shadow plays, magic, acrobatics, Cuju, sumo wrestling, and so on. The construction of the hook column referred to the temple stage at that time. It was completely enclosed and could not be affected by the climate and season. In short, the hook bar originally referred to the railing, which later evolved into the name of the brothel and performance venue.
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Why is the hook bar called hook bar"Goulan" was the main performance venue of Song and Yuan operas in the city. It also had names such as "Gousi","Zulan","Youpeng","Wasi","Washe", etc.
There were several possible reasons for the name:
- The original meaning of the word " hook railing " was a curved railing, probably referring to the shape of the building.
- " Hook railing " might be a homonym for " structure railing ", and the original meaning of " structure railing " referred to the grid on the railing, which might refer to the structure of this kind of building.
- " Goulan " might be a homonym for " Goulian," and the original meaning of " Goulian " was to connect and implicate. It might refer to the function of this kind of building, which was to connect different performance venues.
- "Goulan" may be homonym with "Gouliu", and the original meaning of "Gouliu" referred to stay, stay, and may refer to the attraction of this kind of building, which attracted the audience to stay and watch the performance.
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pulley hookPulley hooks were commonly used in lifting operations. Hooks can be divided into single hook and double hook according to their shapes, and can be divided into forged hook and stacked hook according to their manufacturing methods. In order to ensure safety, its quality and safety factor should reach three times under static load, and it must be made of high-quality carbon steel with good toughness. Pulleys could assist the hook to play a better role in the lifting operation. For example, there were various types of wheels such as 304 stainless steel bearing rollers that could be used with the hook. There are many precautions when using the hook. For example, the user should often carry out daily safety inspection and maintenance of the hook, including cleaning the crane hook group body with non-corrosive organic solution, wiping it dry and checking with a magnifying glass for cracks (if there is any need to replace it immediately, no re-welding is allowed); Check the opening of the hook and the wear of the dangerous section; Check whether the wear of the wheel groove and wheel rim is uniform, whether the wire rope matches the wheel groove, whether the wheel is loose or shaking, etc. In addition, according to the relevant regulations, cranes need to be inspected regularly. Cranes that carry molten metal, tower cranes, elevators, and mobile cranes are inspected once a year. Other cranes are inspected once every two years. The inspection content includes the inspection of the relevant parts of the hook. For example, when the hook body twist angle exceeds 10°, the hook opening is deformed to 10% of the original basic size, etc., a new hook should be replaced, and the defects on the hook are not allowed to be repaired. While watching the Olympics, you can also read the wonderful novels related to the Olympics!
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