英文版本：
design of a liquid level instrument level china has already started in the last century, china as a global level meter level meter important demand market is also more and more attention of traders, the domestic market of high-speed growth of the mass demand, but not to the gospel hui own enterprises, scientific research field of foreign brand monopoly, homebred instrument helpless to army management, still can not get rid of the awkward situation. the scope of application of liquid level meter level meter is very wide, involving food, the environment, human health, medicine, national security, and other test and analysis on related field. it has become one of the most promising analytical instruments, in recent years the global market demand growth rate of more than 10%, chinese market demand growth is far greater than the proportion of even. especially at present, human health, environmental safety and the rational utilization of energy is a serious problem faced by all countries in the world, but also because of its accurate analysis by the qualitative and quantitative ability in the detection process favored liquid level meter level meter. however, the market is prosperous, but did not give us a homemade instrument manufacturers bring too much income, according to the current understanding of the high-end pressure meter in our country totally dependent on imports, that is to say that we favour mostly foreign brand, our market has also become a foreign businessman aspiration of the object. this is not really petty profits ah, a level meter level meter made of the cheapest to hundreds of thousands, import each almost 1000000 to 5000000 or more, a 211 project university optical liquid level meter level meter a device will need to invest tens of millions of,. but the millions and how much is the domestic procurement of goods expenditure? there is not much. domestic level meter level meter: peking university and tsinghua university? estimation is unlikely, as other universities base? i'm afraid with more than a dozen stations together will not. so that more than 10% of the demand and to whom are created, agilent? thermo fisher? or voight? in short, rarely turn to brand china. however, domestic instrument in performance, price and other aspects are not the enemy of foreign products, it gradually lost the market. in order to make a living, these state-owned instrument factory gradually by the independent design and production become foreign product assembly and entrust maintenance, technical strength and equipment will be lost. so the pressure meter industry in domestic brands appeared shu no generals of the situation, we acknowledge the existence of the gap in the high-end pressure gauge field in our and foreign technology, the culprit but led to the situation of domestic instrument by is - the equipment derived data on international not recognized, this is not the only situation, embarrassed, said it is also not too sad. although the domestic level meter level meter also occupy a small part of the education market, but many not to engage in scientific research, but as a general use, play a role model for many strong than not.