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Gemtestinglaboratory
3 个视频
上传的视频
01:33
1
How to cut (sawing) of a Gem
Gemtestinglaboratory
00:22
2
How Make Facets in Gemstones.mp4
Gemtestinglaboratory
00:58
1
GEMSTONES CUTTING & POLISHING.mp4
Gemtestinglaboratory