hat
1. li te gen yon super viv. La rectification/konsomasyon pousantaj moun ki PDC se 20 - 40 tan sa bout tungstène carbure 10 fwa sa bout dyaman.
eng
1. It has a super long life. The grinding/consumption ratio of PDC is 20-40 times that of tungsten carbide bit and 10 times that of diamond bit.