There are two major categories of organochlorine pesticides: one is chlorobenzene, including 666, DDT, etc. These pesticides are rarely used or banned now; the Other is chlorinated alicyclics, including dieldrin, poisoned Fen, nitrogen, nitrogen and nitrogen.
There are two reasons for the poisoning of organochlorine pesticides: one is that the user is poisoned by accidental or contaminated underwear and skin during the production, transportation, storage and use of the pesticide; the other is suicidal behavior, deliberate oral poisoning . The toxicity of organochlorine pesticides to humans is mainly manifested in the invasion of nerves and substantial organs.
Poisoned people have strong irritation, mainly manifested as headache, dizziness, redness, redness, tears, cough, sore throat, fatigue, sweating, hoarseness, nausea, loss of appetite, insomnia, and head and face dysfunction, moderate poisoning. In addition to the above symptoms, there are vomiting, abdominal pain, limb pain, convulsions, purpura, dyspnea, tachycardia, etc.; severe poisoning in addition to the above symptoms are significantly worse, there are high fever, sweating, muscle contraction, epilepsy It is like a seizure and a coma. even death.
First aid treatment
1. When someone accidentally eats 666 or DDT, they should immediately induce vomiting and gastric lavage, and drink poisonous people with a lot of water or baking soda and other alkaline solution, then use fingers or chopsticks to stimulate the throat wall, induce vomiting, and stomach. The toxic substances are spit out, which can accelerate the discharge of poisons in the body, reduce the absorption of toxins, relieve symptoms and control the disease.
2. If it is poisoned by clothing and skin pollution, immediately take off the contaminated clothes, rinse with water first; then wash with baking soda or alkaline soapy water to block the poison to keep warm and prevent colds.
3. In order to expel the poisons in the body as soon as possible, you should also take the method of catharsis and take laxatives, but remember not to use oil laxatives, because oils can promote the body's acceptance of organic chlorine and aggravate poisoning.
4. If the severe poisoning person has respiratory or cardiac arrest, he should immediately perform chest external cardiac massage and artificial respiration, and rush to the hospital for emergency treatment.
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Anti-loosening washer working principle and features Anti-loosening washer how to install
1. Simply place the inner beveled surfaces of the two Washers opposite each other, between the nut and the connection material.
2. After the nut is tightened, the outer radial convex surface of the lock washer and the two ends of the contact surface into a state of bite, and the angle of the bevel angle of the inner side of the washer is greater than the Bolt 's thread angle.
3. When the bolt is stretched due to mechanical vibration, the nut will then rotate loose. As the outer side of the radial convex surface of the anti-loosening washer friction is greater than the friction between the inner beveled tooth surface.
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