It is mainly discussed that the technical details and keys to ligh source Position on gem on stand surface, contact liquid and lester B.
本文着重讨论了光源、宝石在台面上的放置位置、接触液和远视技术等技术关键和细节。
It is mainly discussed that the technical details and keys to ligh source Position on gem on stand surface, contact liquid and lester B.
本文着重讨论了光源、宝石在台面上的放置位置、接触液和远视技术等技术关键和细节。
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