how to drill a small hole in the gemstone round beads automatically
zhuode ultrasonic drilling machine can drill a small hole on hard small stone beads.for 8mm beads , it can drill 85pcs at a time. and the hole can be 0.6mm/0.7mm/0.8mm ....2mm,.it can drilling the beads form 3mm to 20mm
Видео how to drill a small hole in the gemstone round beads automatically канала gemstone machine
Видео how to drill a small hole in the gemstone round beads automatically канала gemstone machine
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