broca salomónica de canal angosto
/mˌakinˈiʎa ðe ˌafeɪtˈaɾ/
n
English: double-twist auger bit · 双螺旋钻头
Significado：Bit made up of two opposing twists; it removes debris quickly as the hole is drilled.
English: double-twist auger bit · 双螺旋钻头