And a Nanjing company has leapt to the "industry first" throne of the country: In early July 2014, is headquartered in London, UK internationally renowned research firm Integer industry consulting firm issued a "Chinese AdBlue market analysis report", the report noted: Jiangsu can In 2013, the sales volume of the Blue Admiral Automotive Environmental Protection Technology Co., Ltd. in China's AdBlue ( vehicle urea solution ) market reached 39.5%, ranking first in the country. This is the news that the reporter received at the new product launch conference held by Kosan. When it comes to car urea solutions, many readers may feel strange. In fact, this is an environmentally friendly product that has seen rapid growth in market sales in recent years. It has a very important role in the governance of urban haze pollution. Various types of professional research data show that nearly one-third of the city's smog pollution comes from the exhaust emissions of diesel vehicles. By using automotive urea solutions, the nitrogen oxide emissions from diesel vehicle exhaust can be reduced by 30%. Above, it directly reduces haze pollution. Urea solution for vehicles is a necessary consumable product for heavy trucks and passenger cars that meet the “National Phase IV Motor Vehicle Emission Standard†(abbreviated as “National Four Standardsâ€). Starting from January 1, next year, the “ National Standard †for diesel vehicles will be enforced nationwide, which means that from next year, all new vehicles produced by heavy truck manufacturers and passenger car manufacturers must meet this standard. By then, the emerging product of automotive urea solution will become an essential product for hundreds of thousands of drivers across the country. The implementation of the "National Four Standards" for motor vehicles is an important measure taken by relevant state agencies to improve air quality and reduce air pollution such as haze. At present, about one-third of PM2.5 smog pollution in urban areas in China is caused by exhaust emissions from motor vehicles, especially exhaust emissions from diesel vehicles. After the implementation of the National IV Standard, the emission of nitrogen oxides from diesel vehicles will be reduced by 30%, and the key “responsible†for this is the urea solution for vehicles. The company was established in 2009 and is part of the Longneng Technology, one of the country's largest privately-owned lubricants companies. It is one of the first companies in China to start producing automotive urea solutions. In the past five years, the company has been leading the way in the industry. Its products were the first in the country to pass the AdBlue certification of the German Automobile Industry Association and the DEF certification of the American Petroleum Institute, and the earliest domestic exports of automotive urea solution products. At present, the mainstream commercial vehicle companies such as FAW and Dongfeng, as well as dozens of public transportation companies including Nanjing Bus, Shenzhen Public Transport, and Hangzhou Public Transport, have all selected kanesu as the designated supplier of urea solutions for vehicles. At the new product launch conference held, Qin Jian, general manager of Komori said that from January to July this year, Kosher has achieved several times the same year-on-year sales growth. It is expected that in the next few years, Kosher will continue to lead the country. Urea market for vehicles. At the same time, on the basis of the existing vehicle urea solution products, this month, they will introduce nine kinds of maintenance products for the National IV Commercial Vehicles to the market from this month, providing market users with a complete solution for the Fourth National Product.
Percussion drilling is employed when auger or wash boring is not possible in very stiff soil or rock. It also can be used in most soil types.
Here the advancement of a hole is achieved by alternatively lifting and dropping a heavy cutting or hammering bit that is attached to a rope or cable that is lowered into an open hole or inside a temporary casing (casings are hollow cylindrical pipes used for borehole stability and to prevent the loss of drilling fluid through the boreholes).
Usually a tripod is used to support the cable. The stroke of bit varies according to the ground condition. The major disadvantage of this method is that it is not possible to get good-quality undisturbed samples. In very hard rock (and especially fractured hard rock), down-the-hole (DTH) drilling can be employed. In this case the hammer, applying repeated percussive pressure, is located just behind the drill bit inside the hole, unlike the open percussion drilling, where the hammer is on top of the drilling string.
The drilling string provides the necessary force and rotation to the hammer and bit, as well as compressed air or fluids to the hammer and for the flushing of cuttings.
This arrangement also allows for much deeper percussion drilling. However, the DTH drills are typically more expensive.
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Jiangsu Kelansu Automotive Environmental Protection Technology Co., Ltd. 
Urea for Cars