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(HD)How to drill a hole in the gem stone round beads

Return release date:2016-08-14 | attention:358

Zhuode Ultrasonic Bead Drilling Machine can drill 19-211pcs round beads at a time.the bead size is from 3mm-20mm. and the hole size is 0.7mm-2.0mm.Suitable for all the stones .

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