Wood bits; single fluted twist bits (twist drills)
木屑；单槽麻花钻头（麻花钻）

1966-11-01

DRILL, MASONRY, HAND (STAR (FOUR-FLUTE) DRILL) (NO S/S DOCUMENT)
手工（星形（四槽）钻孔机）（无S/S文件）

1988-03-17

DRILL, MASONRY, HAND (STAR (FOUR-FLUTE) DRILL) (NO S/S DOCUMENT)
手工（星形（四槽）钻孔机）（无S/S文件）

1988-03-17

High-speed steel two-flute twist drills — Technical specifications
高速钢双槽麻花钻——技术规格

1996-12-26

整体硬质合金深孔内冷却超长直柄麻花钻
Solid carbide parallel shank twist drill with ex-long flutes and internal coolant

2016-10-22