Polishing of diamond whetstone
On 2017-11-18 14:31:32
I understand roughly how to use, but it is easy to understand if there is a simple explanation.
Drill polishing machine maintenance
On 2016-11-14 20:17:04
The clogged black was as pure white as new and finished well.
Prosthetic needle (cactus needle) "Thorn Sharpener" from prototype to production and repair and restoration of old clock
On 2013-01-29 18:23:53
It was a usability-friendly thing better than I imagined.