  The first is the import of new cars. When purchasing imported cars, owners need to check whether the tires are aging. Secondly, when buying used cars, you need to check whether the tires have been replaced. The third step is to fill the tires with shoddy rubber. There is no quality problem with this type of tire, and it will not be long before its practical use.
Avoiding tire maintenance problems
When the tire is inadvertently pierced by a nail, it is better not to pull the nail out directly. This will cause the tire to run out of air and increase the degree of abrasion. If the side of the tire has cuts, scratches, cracks, or wraps, it is best to replace it. Even if it can make up, there will be hidden dangers. When tires have problems with abortion and eccentric wear, four-wheel alignment must be done.
Identify the advantages and disadvantages of tires
For the average user, we only need to care about the tire size parameters. For example: 225/40R1794Y, 225/40 is the aspect ratio (also called the flat ratio), R is the radial tire, 17 is the rim outer diameter, 94 is the load index, and Y is the speed rating.
Check if the tire has been refurbished?
The biggest difference between the retreaded tyres and the brand tyres is the wear resistance. The most intuitive way of judging is: Look, the tyre tread presents blue light, the color is more natural; Press, press the tread with your finger, if there is no fingerprint mark Leave it, then meet the quality requirements; pull, the rubber nail on the tread is not easy to tear, can be restored immediately after release; strokes, with nails crossed the tread, if you do not leave fingerprints, then meet the quality Claim.
Tire identification and selection
If the outer edge of the tire has a large amount of wear, it means that the tire is often under-inflated, that is, the pressure is not enough; second, if the inside of the tire wears and the edge of the outer layer is burr-shaped, this indicates the deformation of the tire and the symmetry of the two tires. Has been affected; Third, if the tire wear parts on both sides of the convex wear, and the surrounding wear is corrugated, then the car's shock absorbers, bearings and ball joints and other parts of the wear degree is more serious; Fourth, if the central area of ​​the tire on the ground wear more serious, indicating that the tire is often over-inflated state; Fifth, if the tire tread has been relatively smooth, you must replace the tire, the tire's life is officially over.
Refined oil equipment mainly used for processing work of the oil squeezed out, to make raw material reach the standards of dump oil (can be barreled on the supermarket)or the national senior cooking oil. Plant oil is just the product of oil pressing or leaching, it contains material that's harmful to the consumer. Some of these substances are naturally occurring, some are in the process of production or storage, for people to consumption, these substances must be removed carefully. Due to the different cause of them, the refining work must take steps under different conditions. According to different crude oil, refining process can be devided into: degumming, deacidification, decoloring, deodorization, degumming, dewaxing and other steps, Can adapt a few of them or all of the process on the basis of oil varieties.
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