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double-twist auger bit /ˈdʌbəlˈɛdʒd ˈɹeɪzə/ n

中文：双螺旋钻头

中文 · 双螺旋钻头Español · broca salomónica de canal angostoFrançais · mèche hélicoïdale à double torsade
Meaning：Bit made up of two opposing twists; it removes debris quickly as the hole is drilled.
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Drill bits and drilling tools

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