More than 500 years ago, dart spent a long time to development.the United Kingdom soldiers who had been ejected in battlefield, it was competing with the bow and arrow was a weapon aiming at a specific target in the battle of leisure has been said that it is roots you.

Then, they throw using only arrow without a bow, target also changes to what was a large tree in round slices, it went a current form. Then it spreads around the world, and led to dart development to boom of today is transmitted to Japan.

Darts, unlike normal sport (competition), rather than the addition competition basically, it is subtracted competition. Therefore, you can feed the judgment that thought of computational power and earlier. Mental target competition, strengthening of the autonomic nervous, concentration sustained enhancement, in addition to the stimulus to the cerebral cortex, because the competition that you respect the manners, such as manners of discipline is attached to the body, the youth as Education and Sports. If there is a wide range of improvements and utility stood, we come to be recommended.

In addition, upon the aging society, and that the momentum is not so many, improvement of physical function, as rehabilitation and blur prevention, including the recovery effect, now not only the competition purposes, as education and lifelong sports, both young and old making it familiar.

More than 500 years ago, dart spent a long time to development.the United Kingdom soldiers who had been ejected in battlefield, it was competing with the bow and arrow was a weapon aiming at a specific target in the battle of leisure has been said that it is roots you.

Then, they throw using only arrow without a bow, target also changes to what was a large tree in round slices, it went a current form. Then it spreads around the world, and led to dart development to boom of today is transmitted to Japan.

Darts, unlike normal sport (competition), rather than the addition competition basically, it is subtracted competition. Therefore, you can feed the judgment that thought of computational power and earlier. Mental target competition, strengthening of the autonomic nervous, concentration sustained enhancement, in addition to the stimulus to the cerebral cortex, because the competition that you respect the manners, such as manners of discipline is attached to the body, the youth as Education and Sports. If there is a wide range of improvements and utility stood, we come to be recommended.

In addition, upon the aging society, and that the momentum is not so many, improvement of physical function, as rehabilitation and blur prevention, including the recovery effect, now not only the competition purposes, as education and lifelong sports, both young and old making it familiar.

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
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By evaporating and neutralizing of two ammonium tungstate with different density ,crystals of ammonium paratungstate (NH1)10W12O11·Nh2o(n=11,7,5)were prepared with ultrasonic .UsingXRD,DTG and granularity analysis, the crystalline form was confirmed and researched .The results proved that the effect of ultrasonic on ammonium tungstate was in evidence .The crystalline forms were the same with ultrasonic and without ultrasonic, but impure apexes on the XRD patterns were less and value of d/A more tallied with literature with ultrasonic . Distributing of crystalline granularity became narrower and the crystal was more homogeneous. Ultrasonic shortened the formation time nucleus of crystal .

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
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Separation of tungsten and molybdenum in production process of ammonium paratungstate is important working procedure ,but this is always one of difficult technical problems .General flows of various ammonium paratungstate technologies and basic nature of molybdenum were summarized .Moreover advantages and disadvantages of each separation method for tungsten and molybdenum in production process of ammonium paratungstate were systemarically analyzed .A nalysis results indicated that there many advantages , such as short process folw small tungsten loss, good molybdenum eliminating effect, simplicity of operation,low environmental pollution and economy feasibility to eliminate molybdenum by ion-exchange method . It is precisely because of these advantages, ion-exchange method to eliminate molybdenum has a good industrial application prospect.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
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Ammonia in APT crystal mother liquor was removed by adding sodium tungstate with sodium hydroxide and magnesium salts. The results show that the content of ammonia in the treated solution can be removed down to 0.042g/L up to 98.8 ％ removal rate. The resultant sodium tungstate solution was diluted 10 times befote prepared as ion exchange feed solution., the content of ammonia in the raffinate is less than 0.0005％, which can meet China national discharge standard .

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn