First, we must first consider the following points when purchasing 1, their own economic capabilities. When purchasing a tractor, it is necessary to consider the use of the tractor according to its economic affordability, whether it is for personal use or making money, or both, and whether the nature of the work is transportation or Shimoda operations. The decision is to purchase large and medium-sized tractors (referring to 25 horsepower and Above) is a small tractor. If it is used for harvesting, rotary farming or professional transportation to make money, appropriate research should be conducted to avoid excessive investment and low output losses. This refers to the selection of tractors. Of course, it is also necessary to consider that the supporting agricultural machinery should meet the local agronomic needs. 2, consider the choice of large-scale products or brand-name products. There are not many large and medium-sized tractors in China. There are many small-scale tractors. The production of walking tractors is concentrated in Jiangsu Province, and the production of small four-wheel tractors is concentrated in Shandong Province. What needs to be reminded is that the â€œEastern Redâ€ brand of China Yituo Group Company and the â€œDongfengâ€ brand of Dongfeng Agricultural Machinery Group Corporation (Changzhou Tractor Factory) are all â€œChina Famous Brandsâ€ in the tractor industry. They are all obvious on tractors. The logo can be given priority to purchase. 3, the price factor as the first consideration. To reputable companies to buy, can not be free of charge, do not listen to biased distributors to promote the product, but to product quality, product prices, Three Guarantees and other aspects of comprehensive consideration. Need to be reminded that a small tractor is often only a few hundred dollars cheaper, but once cheated, the loss will be great. If you want to compare prices, you should also compare prices of the same brand with the same specifications. As for diesel engines with different brands and different brands, even the same specifications have different prices. The production companies are different. There is no comparability, so the farmers should pay attention to the identification and prevent the dealers from Low-priced scorpions sell fake and shoddy products. Second, when buying a tractor, pay attention to the following points: Look. Mainly to look at the following aspects: 1, the machine must be affixed with diamond-shaped "agricultural machinery promotion permit", or through the agricultural product quality certification that CAM certification. This certification is conducted by the Ministry of Agriculture's agricultural machinery test and appraisal station to inspect the production conditions of the production enterprises, review the company's technical documents, and issue the company's products after passing the quality inspection. The validity period is five years. This tag is actually a sign of product quality. It is recommended that when purchasing tractors, the Agriculture Ministryâ€™s Agricultural Promotion Permit or CAM-certified products should be given priority. If there is no ministerial-level agricultural promotion certificate, there may be provincial-level considerations. If there is no promotion permit, users are advised not to purchase because The quality of these products cannot be verified. 2, look for the name of the plant, site and trademark. As mentioned earlier, due to the large number of tractor-producing enterprises in the country, especially small tractors, the words â€œChangzhou in Chinaâ€ and â€œCangfang in Chinaâ€ flood the market. Under such circumstances, users cannot be confused by this appearance. It is to compare and choose. If there is only a vague "China Jiangsu" or English nameplate, it should be carefully selected. 3, see the production date. Do not underestimate the date, first, because the tractor has tires, oil seals and other rubber products, these products will be aging over time; Second, the tractor will be based on market improvements, the closer the date should be more advanced and reliable products. The user generally chooses tractors that are closer to the production year. 4, look at the appearance of the tractor. To see if the paint is beautiful, appearance should be smooth, smooth, no blisters, cracks or burrs, no rust, no three leakage phenomenon, whether the tire quality meets the requirements, should not appear bulging, cracking phenomenon. Whether the parts are defective or not. Second touch. Whether there is a three-leakage phenomenon, especially the junction and seal of the box. Three trials. When purchasing a tractor, a test run is also carried out to test the diesel engine and the chassis of the tractor to check the quality of the corresponding moving parts. The following points should be noted when commissioning. 1. First check the starting performance of the diesel engine, the throttle control system, and the idle operation of the diesel engine. The operation of the diesel engine after starting should be easy and smooth without any noise, and the exhaust gas should be colorless, transparent or light gray. 2. Second, check the gearbox, check the free travel and steering performance of the steering wheel, check the brake system, hydraulic system, check the tires, and check the lighting system. The trial run of the tractor chassis includes whether the steering is light and flexible, whether the brake is smooth and safe, the work of the clutch and the gearbox are normal, the gearbox is not geared with heavy friction noise and other abnormal sounds, and the hydraulic system performance is good. Convenient and flexible, no leakage, etc. to ensure reliable tractor performance. Third, the other 1, after the purchase to check whether the annex is complete, random toolbox generally includes a small number of diesel engine wearing parts and random maintenance tools, as well as operating instructions and parts atlas, which are indispensable for use and maintenance of. 2. Obtain â€œone ticket and two certificatesâ€. One ticket is the sales invoice. The second certificate refers to the product certificate and the three pack certificate. This is the â€œReturn, Replacement, and Repair Regulations for Agricultural Machinery Productsâ€ promulgated by the five ministries and commissions of the State Economic and Trade Commission. Three packs of important documents. 3, request instructions. Carefully follow the instruction manual for necessary maintenance, maintenance, and operation.
For the treatment of diseases of the respiratory system:
Diseases and conditions of the respiratory system fall into two categories: Viruses such as influenza, bacterial pneumonia and the new enterovirus respiratory virus that has been diagnosed in children; and chronic diseases, such as asthma and chronic obstructive pulmonary disease (COPD). According to Dr. Neal Chaisson, who practices pulmonary medicine at the Cleveland Clinic, there is not much that can be done for viral infections but to let them run their course. "Antibiotics are not effective in treating viruses and the best thing to do is just rest," he said.
COPD is the intersection of three related conditions - chronic bronchitis, chronic asthma and emphysema, Chaisson told Live Science. It is a progressive disease that makes it increasingly difficult for sufferers to breath.
Asthma is a chronic inflammation of the lung airways that causes coughing, wheezing, chest tightness or shortness of breath, according to Tonya Winders, president of the Allergy & Asthma Network. These signs and symptoms may be worse when a person is exposed to their triggers, which can include air pollution, tobacco smoke, factory fumes, cleaning solvents, infections, pollens, foods, cold air, exercise, chemicals and medications.
Lung cancer is often associated with smoking, but the disease can affect non-smokers as well. Every year, about 16,000 to 24,000 Americans die of lung cancer, even though they have never smoked, according to the American Cancer Society. Like all cancers, lung cancer is caused by the uncontrolled growth of abnormal cells.
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