Auger bits are used to grow 3" diameter drill bits for growing 3"×9", 3"×16.5", 3"×24" ,220*40mm,220*50mm,300*80mm bulb auger st

Auger bits are used to grow 3" diameter drill bits for growing 3"×9", 3"×16.5", 3"×24" ,220*40mm,220*50mm,300*80mm bulb auger st

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