treimine treitera (astmetera, pikitera) sirgettenihkest erineva, detaili kolmemõõtmelist vormi kopeerivat kontuuri mööda (vrd kujutreimine), making a three-dimensional reproduction of the shape of a template by controlling the cutting tool with a follower that moves over the surface of a template or using a CNC lathe (compare: form turning)