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Anonymous users2024-02-06The piston is the power generating device in the engine, which generates power by compressed gas, and the piston movement is that the piston and the cylinder block move forward and backward seamlessly.
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Anonymous users2024-02-05It is mainly composed of cylinders, pistons, connecting rods, crankshafts, valve trains, propeller reducers, casings, etc. Piston movement cylinders are where the mixture (gasoline and air) burns. The cylinder contains a piston for reciprocating motion.
The cylinder head is equipped with an electric spark plug (commonly known as an electric nozzle) that ignites the mixture, as well as intake and exhaust valves. When the engine is working, the cylinder temperature is very high, so there are many heat sinks on the outer wall of the cylinder to expand the heat dissipation area. The arrangement of cylinders on the engine housing (casing) is mostly star or V-shaped.
Common radial engines are available in 5, 7, 9, 14, 18 or 24 cylinders. In the case of the same single cylinder volume, the more cylinders the more engine power. The piston is subjected to gas pressure and reciprocates in the cylinder, and this movement is converted into the rotary motion of the crankshaft by means of a connecting rod.
The connecting rod is used to connect the piston to the crankshaft. The crankshaft is the component of the engine's power output. When the crankshaft rotates, the reducer drives the propeller to rotate and generates a pulling force.
In addition, the crankshaft also drives some accessories (such as various oil pumps, generators, etc.). The valve train is used to control the opening and closing of the intake and exhaust valves at regular intervals.
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Anonymous users2024-02-04Introduction to Track Race Track race is a type of track and field sport, which is a general term for running and walking events that are carried out on the track of the track and field field or on the specified road. The Olympic Games have 100m, 200m, 400m, 800m, 1500m, women's 3000m (this event will be cancelled from the 25th edition, and the women's 5000m, 10000m, marathon, 3000m steeplechase (men's hurdles) (women's rice hurdles, 10km race walk (women's km race walk), 50km race walk (men's 100m relay, 4 400m relay). Among them, the marathon runs are quite different from place to place, so there are only the best results, and there is no Olympic record.
In each competition of the track race, if there are a large number of participants, the preliminary round, the second round and finally 8 people can participate in the final, and the results of the final will be used as the final ranking result. Track races must be run in an anti-clockwise direction (i.e. with the left hand close to the inner circle). The number of passes (or starting positions) is determined by drawing.
The starting point must be used at the start of the first pole of the lane separation run and relay run (other track races are not allowed, and the three starting signals of "each in position", "ready" and firing the gun are used, and only one password of "each in position" is used for some lane separation and non-lane running events, and then the gun is fired. Two fouls at the start will result in disqualification. Squeezing or blocking others from running in will result in disqualification.
Runners who should run in the lane, who are not directly forced to run out of the lane and who receive assistance (accompaniment, offer or guidance) from others during the race, and who are warned and repeat offenses, will be disqualified. The order in which any part of the athlete's torso (excluding head, neck, arms, hands, legs, and feet) touches the vertical plane within the finish line is the order in which the athlete reaches the finish line.
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Anonymous users2024-02-03Generally, school sports should have the following events: sprinting, 50-100 meters, 200 meters, and 400 meters. Middle-distance running: 800 meters, 1500 meters, 3000 meters. Forty into a 100-meter relay.
Throwing events, javelin, shot put, discus, long jump, high jump. There seems to be a tug-of-war in a group project. There should be a football game at the end.
I think of this from memory.
Life is meaningless.
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It should be because there is a discrepancy between the boy's future plan and the girl's ideal boy's future plan, so I will say this, as for what it means to have great ambitions, everyone's definition is usually different, some people are considered to be the president of a large company, some people are considered to have a monthly income higher than ordinary people, some people are going to backward areas to practice medicine, help people who need help, some people want to become an authority in the field, but if these goals are set too high, they usually become a mouthpiece, too low and not enough"Great"...View the original post
Hope it helps. There is currently no reliable method for motor neuron disease, it is a refractory disease, and the survival rate after the disease is generally found to be about 5 years, but there are many types of motor neuron disease, and the survival rate is not the same, with an average of about 5 years. However, in recent years, there have been gradual reports in clinical practice: >>>More
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People live to live a happier and happier life, and a happy life must be fought for by themselves. People in pursuit of their own happiness, there is a desire to fight for it, for the goal of life people must make themselves work hard, find fun in the work, make the monotonous work full of fun, make themselves carefree, physically and mentally healthy, live a peaceful and comfortable life, and live happily every day. This is the joy that everyone is looking for. >>>More