Abstract On August 20th, the Russian "Alrosa" diamond company held the first diamond and diamond sales activities at the Shanghai Diamond Exchange (SDE). The trial transaction sold for $245,000 in diamonds and more than $505,000 worth of gold...
On August 20th, the Russian "Alrosa" diamond company held the first diamond and diamond sales activity at the Shanghai Diamond Exchange (SDE). The trial transaction sold for $245,000 in diamonds and diamonds worth more than $505,000. The “Alrosa†diamond company evaluated the results of the trial sale and believed that the parties involved in the exchange were highly interested and planned to continue to cooperate with SDE. Company executives said that the signing of a cooperation agreement with the Shanghai Diamond Exchange will further promote cooperation with Chinese companies. Previously, “Alrosa†Diamond Company and Chow Tai Fook Jewellery Group Co., Ltd. signed a long-term cooperation agreement on the supply of diamond raw materials. The Shanghai Diamond Trading Agreement was signed in April 2013. The president of “Alrosa†Diamond Company has high hopes for cooperation with Chinese companies and believes that China has great potential in the field of jewelry consumption such as diamonds.
step Drill Bit is a drill bit that has the tip ground down to a different diameter. The transition between this ground diameter and the original diameter is either straight, to form a counterbore, or angled, to form a countersink.
The advantage to this style is that both diameters have the same flute characteristics, which keeps the bit from clogging when drilling in softer materials, such as aluminum;. Most of these bits are custom-made for each application, which makes them more expensive.
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