90 degree air grinder makes the polishing effect more uniform and smooth. ·Type: Pneumatic engraving machine. 1x Pneumatic Engraving Polished Machine. 1 x Pneumatic Engraving Polished Machine. The mini air polisher is small in size, light in weight, easy to grasp and operate, and different types of back plates can be installed with different types of sandpaper.
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