Now, every time I put on a hard hat, I can't help thinking about what happened three years ago.
It was one afternoon in the fall. My colleagues and I prepared to transfer tubing in the hospital. When I walked into the construction site wearing a hard hat, a colleague said: "This is a simple task. It will be done in a few minutes. If you wear a hardhat, you don't have to wear it." I said, "You can't be careless, or be careful." Say firmly tie the lower jaw of the helmet. Then we started loading the tubing into the car, and soon a car was installed. At this time, I started to do the last job after the construction --- to raise the legs of the tubing truck to the platform of the car.
This is a new type of tubing transport vehicle that our team has entered. Due to its unfamiliarity with its performance and improper operation, when I forced my leg to the vehicle, the 40-kilometre weight leg immediately took me. The bullet landed on the ground. Then I heard a bang, and the legs of the tubing truck slammed on my head and the brain suddenly appeared blank. My colleague was shocked and hurried over and took the leg off my head and pulled me from the ground. They looked at me and asked, "How is it?" I took it. The body was patted and smiled and said to them: "It's okay. Well, I don't have any injuries on my head." A colleague patted my helmet on his head and said with emotion: "Fortunately, today you wore a helmet. And the mandible belt is fastened. The hat doesn't fly out when you fall, or if you don't have tens of kilograms of things on your head, the consequences are really hard to think!"
Really, it was the hard hat that saved me. Since then, as long as the construction I have to wear a safety helmet, and must check whether the mandible belt is fastened.
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Pressure sensor usually consists of a pressure sensor and a signal processing unit for measuring the pressure of liquids and gases.
According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. According to the working principle, it can be divided into Ceramic Pressure Sensor, diffusion silicon pressure sensor, piezoresistive pressure sensor, sapphire pressure sensor and so on.
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