The most feared thing in trips is accidents. In addition to being hysterical about being broken, trip wallets are hysterical that they've no leakproof function. Luggage without leakproof function may make clothes damp and make it infelicitous to walk happily on stormy days. Thus, numerous trip suckers and business people on business prefer leakproof luggage. What fabrics are generally used for leakproof luggage?

　　The most common soft trolley cases on the request are substantially nylon. The nylon trolley case itself is strong and durable, wear-resistant, and largely plastic. It's the most durable material among the cloth accouterments. Is it leakproof? The advanced the viscosity of nylon, the further durable it is. It isn't leakproof, but due to its superior material It can be published with leakproof coating, so it gives the nylon trolley case a leakproof effect. Still, it should be noted that only pure nylon trolley cases on the request have similar superior conditions.

　　The hard luggage case is a one-time stamping and forming a case. The hard luggage has an exquisite appearance, and the material is flexible and strong. Generally, PP, PC, ABS, and PC ABS are generally used. The rigid luggage accouterments are each hard, high-viscosity, heat-resistant, impact-resistant, honey-retardant, and have good mechanical parcels at normal operating temperatures. The material named for the rigid trolley case is impermeable and can block any liquid; thus, it has the function of segregating water, which is more leakproof than the abs luggage. So compared to the soft trolley case, the hard trolley case is more precious

　　Needless to say the importance of car headlights for driving safety, especially at night. Because the headlights are not bright enough and the road is not clear, there are not a few car accidents. Secondly, the front face of the car is the facade, while the headlights are the eyes of the car, and the lights are the eyes of the car. A qualified headlight should not only have a higher safety factor but also reflect the fashion so that our car is more high-grade and more face-to-face when driving!

　　As the first-generation car headlights, halogen lamps are cheap, low-cost, and have a good penetrating power. They are mainly provided by the original factory and still have a certain market foundation. Philips and Osram occupy a dominant market position.

　　The high brightness of xenon lamps can better meet the requirements of modified car owners. The light is dazzling, looks white, or even blue, which is more beautiful. Although it is troublesome to change the route, the owners of the modified car do not care. Therefore, professionally modified car owners like the configuration of xenon lamp + lens, which can better meet their needs.

　　LED headlights are a trend, safe and energy-saving, and easy to upgrade. However, there are very few competitive brands in the market, and most products need to be further optimized. Secondly, many car owners still stay thinking that LED headlights are the configuration of luxury cars, and they are expensive.

　　Laser headlights are the latest generation of car headlights that are more advanced than xenon lamps and led auto headlights, leading in all aspects. It is more energy-saving and brighter, and the irradiation distance can reach 400 meters. At present, the cost is too high and there are very few applications. Some large companies like BMW and Audi are already developing it. Due to the high cost, it will take a long time to fully realize the technology's maturity.

　　Wood is one of the most widely used objects in nature and is also called the secondary xylem of plants. Wood is mainly classified according to its composition, structure, and production time. Hardwood and softwood contain parenchyma that is used for certain functions, such as photosynthesis, secretion, and storage. Hardwood and softwood are part of the wood and look very similar to each other, but they are completely different.

　　The difference between hardwood and softwood is that hardwood is obtained from woods with dicotyledonous angiosperm trees or flowering plants, while softwoods are obtained from woods with monocotyledonous and gymnosperm trees. The main water transport element in angiosperms called blood vessels is present in hardwoods, but not in softwoods.

　　Hardwood is hard and complex, with uneven texture. It is obtained from the tree of the dicot angiosperm or flowering plant. Hardwood has a more complex structure and high density. Hardwood consists of blood vessels and tracheids that transport water to different parts of angiosperms. The blood vessels in the hardwood are called angiosperm characteristics.

　　The soft woody texture is soft and the texture is light. It is obtained from trees of monocotyledonous gymnosperms or non-flowering plants. The structure of cork is simple and light, with low density. There are no blood vessels in cork. Therefore, there are more tracheids instead of blood vessels, transporting water to different parts of the gymnosperm.