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Domestic polycrystalline diamond for copper wire is a kind of diamond aggregate synthesized under high temperature and high pressure with diamond powder, using cobalt or silicon as catalyst. Relatively speaking, diamond made by these two methods has different characters. It has a wide gap in physical properties and product stability with imported polycrystalline diamond and domestic cobalt-based polycrystalline diamond. The drawn copper wire has better toughness and the service life of the die is up to three months.
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