GB/T 3506-2008
螺旋槽丝锥
Machine taps with helical flutes
2008-06-03
JB/T 14372-2022
小直径30°楔形防松螺纹螺旋槽丝锥
2022-04-08
JB/T 12141-2015
小直径螺旋槽丝锥
Small size machine taps with helical flutes
2015-04-30
JB/T 13336-2017
小直径统一螺纹螺旋槽丝锥
Taps with helical flutes for small size unified inch screw thread
2017-11-07