Give me five bitcoins
bitcoin, English name bitcoin, is a digital currency based on blockchain technology, which is composed of a series of computer-generated complex codes. Like RMB's ¥ and US dollar's $, bitcoin has its own symbol, the "B" in the figure below
The inventor of
bitcoin is Nakamoto. Satoshi Nakamoto is the creator of bitcoin protocol and its related software bitcoin QT. In 2008, he published a paper called "bitcoin: a peer-to-peer electronic cash system", describing an electronic currency and its algorithm that he called "bitcoin"
In 2009, he released the first bitcoin software and officially launched the bitcoin financial system In 2010, he graally faded out and handed over the project to other members of the bitcoin communityNakamoto is believed to hold about one million bitcoins. If the price of each bitcoin was $2W, it was worth $20 billion at one time. So far, his true identity is still unknown to the outside world, that is to say, no one knows who Nakamoto is
bitcoin appeared after the global financial crisis in 2008. In fact, before that, many people have tried electronic currency, digital currency and virtual currency, but they have not succeeded. There are not only technical reasons, but also social environment and economic background reasons. To some extent, it was the 2008 financial crisis that gave birth to bitcoin
whether the eyes are bleak or not, Shaohua is easy to cause white heads.
This sentence comes from economist Lang Xianping. When he discussed bitcoin in a TV program, he said that bitcoin has no value, so don't give it to him
later, bitcoin rose all the way to more than $10000 each, so many people g up old pictures to satirize him< br />
the first kind of cattle and your team, as long as you have food in your pocket, it will automatically eat, not limited to raw meat or food
if the second kind of cattle is in line with the team without food, it will be hungry. The solution is to put the food in the backpack of the cattle.
contents
Introction
brief history of development
stage of development
bicycle club
Proct Introction
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Shimano
Shimano, as a famous brand of bicycle parts, is well-known all over the world. The reason why Shimano has such a wide range of fans and reputation around the world is mainly e to its functional system design idea to guide the proction of bicycle parts. Shimano broke the previous static design idea of taking indivial parts as the core, boldly adopted the dynamic design method of taking functional parts as the purpose and the comprehensive function of bicycle system as the key link, established its unique functional system design idea, and created many revolutionary procts. Constantly promoting the reform and evolution of bicycle. Shimano group was founded in 1921 with its head office in Osaka Prefecture, Japan. After more than 80 years of development, its subsidiaries are located in 17 countries around the world, and become a multinational company specializing in manufacturing and selling bicycle parts, fishing gear, snowboard and golf procts< In 1921, Shozaburo Shimano founded Shimano iron and steel plant and began to proce Shimano flywheel. In 1931, it began to export Shimano flywheels. In 1940, it was reorganized into a joint stock company and renamed Shimano Steel Co., Ltd. In 1951, it was renamed Shimano Instrial Co., Ltd. 1956 started proction of Shimano transmission. In 1957, we started to proce the ximano 3-speed rear flower drum with internal gear wheel. In 1960, cold forging technology was developed. The handlebar controlled three speed flower drum was developed for the first time in Japan. In 1965, Shimano united America company was established in New York, USA. In 1967, Skylark transmission and automatic connecting devices were proced. Shimano Yamaguchi joint stock company was established in Yamaguchi Prefecture of Japan in 1970. The newly established fishing gear Department began to proce fishing rods and reels. In 1972, Shimano Europe was established in Dusseldorf, West Germany. Released Dura-Ace series of bicycle racing parts. The shares are listed in Osaka's second unit. Shimano Singapore company was founded in 1973. The company's shares are listed in Osaka and Tokyo at the same time. In 1974, Shimano sales association was established in California, USA. In 1978, the Sales Office of fishing gear department was established in the United States. In 1980, Shimano ax series of aerodynamic racing system components was published. 1981 published "1-2-3 shift" gear conversion system. In 1982, we published the series of mountain bike components, Deere XT. Sis and new Dura-Ace series were published in 1984. Shimano cup Fishing Series opens. In 1986, Shimano America company and Shimano sales company were merged to form a new Shimano America company in Irvine, California. In 1989, his royal highness Naruhito visited Sakai headquarters in Japan. Shimano Malaysia parts company was established in 1990. In 1991, Shimano bicycle development center was established in Sakai, Japan. The name of the company was changed to Shimano Co., Ltd. P.T. Shimano Batam was founded in Indonesia. In the same year, Shimano re-ex cross Japan MTB competition opened. And published mountain bike parts Shimano XTR series. In 1992, Shimano Bicycle Center and Bicycle Museum were opened in Sakai, Japan. In the same year, Shimano Kunshan bicycle parts company was established in Kunshan City, Jiangsu Province, China. In 1995, Shimano stock company directly took over Shimano Yamaguchi and Shimano fishing gear sales company. The auto-d rear flower drum with automatic shift was published in 1997. In the same year, the physical sports department was established. In 1998, the company passed ISO 9002 certification. Build Italian manufacturing plants. In the same year, ra ace bicycle racing parts series was published for the 25th anniversary. 1999 Shimano aviation transmission system. In the same year, the road racing wheel group was published. 2000 passed ISO14001 / 9001 certification. The concept of digital integrated intelligent bicycle parts was published. Shimano was incorporated into the publisher of ETS. Bertin in France. In 2001, Shimano Czech Republic branch and Shimano Shanghai Branch were established. Shimano Taiwan Branch was established in 2002. In April 2003, Shimano Group invested 15 million US dollars to establish Shimano (Tianjin) bicycle parts Co., Ltd., or STJ, in Tianjin, China, covering a total area of 84916 square meters< In April 2003, STJ was officially registered in Tianjin. In October 2003, STJ factory started construction. In July 2004, STJ phase I project was completed. In October 2005, STJ passed the quality, environment, environmental protection, environmental protection and environmental protection standards at one time Certification of three systems of occupational health and safety in December 2005, STJ phase II project was started to build
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Shimano
Shimano bicycle club was founded on May 1, 2002, with the purpose of absorbing the majority of bicycle lovers, expanding mass bicycle activities and actively promoting national fitness activities, To improve the direction of cycling in China, the club has more than 2500 members from all over the country. Since its establishment, the club has organized several large-scale activities. Actively strive for the support of all sectors of society, closely rely on the majority of car fans, and strive to develop their own mass and professional advantages; To plan and undertake competitions, training and exchanges at all levels as the carrier; To expand skills, fun, adventure based "fever level" movement as the focus; Constantly expand and improve the scale, level and influence of mass cycling<
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Shimano proct grade division mountain bike parts grade from high to low XTR, saint, XT, LX, Deere, Alivio, acera, Altus, tourney road bike parts grade from high to low Dura-Ace, ultegra, 105, tiagra, Sora, 2200, a050 XTR: an art representative of off-road vehicle parts XT: unremitting pursuit of high-performance mountain bike kit technology LX: home High energy kit for outdoor car deore: a high-performance kit that brings real cycling fun. I'll take the 2003 dental disc + middle axle as an example to talk about the difference: of course, above deore are hollow crank arm plus spline (one of deore's models is square hole) plus 9-speed. The following mainly talks about the difference. XTR: the crank arm is made of cast hard aluminum, the discs are made of 7075 aluminum, the chain wheel nuts and screws are made of 7075 aluminum, the length of the legs ranges from 165 to 180mm, and there is a model for every 2.5mm, that is to say, there are seven kinds of lengths, with an average weight of 797g. The middle shaft and the tooth plate are integrated. The other models are not integrated. XT: the crank arm is cast aluminum, the small plate of the middle plate is not 7075 aluminum, the nuts and screws are also ordinary aluminum, the leg length has five specifications, and the average weight is 872g. LX: on the basis of XT, the middle plate is made of aluminum, the small plate is made of steel, the screw is made of stainless steel, the nut is made of steel, the leg length is only 170 mm and 175 mm, and the average weight is 906 G. Deore: the medium and small plates are all made of steel. The large plate is made of one kind of steel and one kind of aluminum. One model of the central shaft is not hollow (UN), and the other model (ES) is the same as the LX and above. The average weight is 972g ~ 1093g. Another example is flywheel: XTR with 9 sections: the big four discs are titanium, and the small five are steel. The surface treatment of the gear plate is made of Ti / Ni-P light alloy base, weighing 240g. XT: all the plates from XT down are steel plates, and the surface of the gear plate is chrome plated, weighing 300g. LX: the base is no longer light alloy, and the surface treatment of the gear plate is & quot; Pearlescent surface treatment;, Weight 330g deore: the surface of the tooth is plated with Ni, and the weight is 358G. XTR is to make things into high-quality procts at any cost. In fact, it is not necessarily not rable, but sometimes the former is considered to a certain extent in terms of high performance and rability. XT is a good example of eliminating luxury goods: for example, it doesn't use titanium or special materials, and it still uses materials with reasonable prices. LX is a short version of XT, which is lazy in some places. Deore is enough.
if you want to transfer in, you can choose to recharge and send the recharge address to others, so that others can fill in your recharge address at the withdrawal place.
