... .T38,T45,T51 2.manufacture of series drill rod 3.professional technical team 4.ISO9001:2008 T45 extension drill rod :Our company ... for mining, coal cutting, tunneling, rock cutting in quarrying.T38 extension drill rod,length from 1220mm,1525mm,1830mm,3660mm to 6095mm ... ,3660mm to 6095mm.T51 extension drill rod,length from 1220mm,1525mm,1830mm,3660mm to 6095mm.We can manufacture all kinds of bits ...