1987
- Categories:Development history
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- Time of issue:1987-01-01
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(Summary description)In 1987, the diamond bit design and manufacturing technology of Hughes Company of the United States was introduced, and a diamond bit branch of Jianghan Bit Factory was established.
1987
(Summary description)In 1987, the diamond bit design and manufacturing technology of Hughes Company of the United States was introduced, and a diamond bit branch of Jianghan Bit Factory was established.
- Categories:Development history
- Author:
- Origin:
- Time of issue:1987-01-01
- Views:0
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In 1987, the diamond bit design and manufacturing technology of Hughes Company of the United States was introduced, and a diamond bit branch of Jianghan Bit Factory was established.
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