Fast reference positioning sleeve for electrosparking of antique coins
The invention discloses a fast reference positioning sleeve for electrosparking of antique coins. The fast reference positioning sleeve for electrosparking of the antique coins is characterized in that a through hole on the upper portion of a locating exploratory is matched tightly with an electrode...
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Main Author | |
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Format | Patent |
Language | Chinese English |
Published |
20.07.2018
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Subjects | |
Online Access | Get full text |
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