hat
Dyamèt gwo moso pou sovtaj: ɸ, 300,, ɸ,, 450,, ɸ,, 600 (espesyalman pou lòt forage operasyon forage wout ak sekou)
eng
Large diameter bit for rescue: ɸ300,ɸ450,ɸ600(Specially for across roadway and rescue borehole drilling operations)