| we produce all kinds of hss twist drill bits,
It includs by standard:
1)DIN338, DIN1897, DIN340, ISO235, ANSI B94 11M
DIN345, DIN1870, ANSI B94.11M
It includs by material:
1)hss 4241#, hss 4341#, hss9341#, M2, M35 and so on
It includs by manufacturing process:
1)... |