My personal observations and comments mostly concerning dental technology.
see the work of this guy here > https://www.youtube.com/channel/UC2wy38Msxte6rkQXZbt7MZQ?view_as=subscriber
see the work of this guy here > https://www.youtube.com/channel/UC2wy38Msxte6rkQXZbt7MZQ?view_as=subscriber
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