I.S.I. 5364-1969, . (1971). TWIST DRILLS FOR TAPER PINHOTES. : .
I.S.I. 5364-1969, . 1971. TWIST DRILLS FOR TAPER PINHOTES. : .
I.S.I. 5364-1969, . TWIST DRILLS FOR TAPER PINHOTES. : . 1971.