棘齿弓钻 ratchet brace

弓钻钻孔器 brace bit

弓形手钻嘴 brace bit

弓形钻 arched drill

手钻弓柄 [机] drill bow

钻石弓 Diamond Bow

弓柄钻机 arch bar drilling machine

弓弦钻 fiddle drill

椎弓根钝头钻 a blunt-tipped drill