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The Characteristics of Diamond Tool Grinding
Jan 15 , 2021
1. Process characteristics of diamond tool grinding The grinding of diamond tools has its own technological characteristics. The more prominent feature is the high hardness of the material, which caus...
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The discovery of Concrete Floor
Nov 19 , 2020
In the autumn of 1958, experts from the Cultural Relics Department of Gansu Province carried out a cultural relic survey in Tianshui City of Qin'an. In the suburbs northeast of the county seat, archae...