直柄钻头 meaning in Chinese

straight drill
straight shank bit
straight shank drill

Extension rod of parallel shank drill . dimensions
直柄钻头接杆.尺寸
Slow - helix straight shank drill
小螺旋角直柄钻头
Specification for dimensions of driving tenons and sockets for parallel shank drills and machine reamers
直柄钻头及铰刀用转动榫及套筒尺寸规范
Hardmetal insert tooling - specification for cylindrical shanks with a parallel flat for drills with indexable inserts
镶硬质合金刀具.第21部分:带可转位硬质合金镶刃的直柄钻头规范