1)longitudinal section,纵切面2)Area of longitudinal section,纵切面面积3)tangential longitudimal section(TLS),弦向纵切面4)route profile,管了线路的外形（或纵切面图）5)slit,纵切6)slitting,纵切
用法和例句
this system has well user interface and easily operational CAD subsystem,automatically creating slit part’s technics CAPP subsystem and automatically creating NC code CAM subsystem which also can simulate NC program.
