- synthetic diamond
- 2017-01-06 18:59
- 1.Usage:lapping, grinding and polishing of optical objects, magnet heads, gems 2.Better shape&puritysynthetic diamondCha
- industrial diamond
- 2017-01-06 18:59
- 1.Usage:lapping, grinding and polishing of optical objects, magnet heads, gems 2.Better shape&puritysynthetic diamondCha