数控外螺纹磨床
CNC grinder for external thread
内螺纹磨床
internal thread grinding machine
数控内螺纹磨床
CNC grinder for internal thread
内螺纹外翅片铸铁管
Casting tube with female screw and side fins
内螺纹外肋片铸铁换热管
Cast iron heat exchange tube with inner corrugation and outer fins
内外螺纹车刀
internal or external threading tool
万能螺纹磨床
universal thread grinding machine