... bit, taper chisel bit and taper cross bit), thread bit( R thread and T thread), retrac bit and dth bit( from ... bits : For light drill machine cut high hardness is not drill layers, facilitate the grinding.2. Cross type and cruciform type rock ... medium rock VI. Technique Parameters: (Taper chisel, cross, button bit)High-pressure drill bit:V. Certifications:VI. Contact Information:If you have ...