Ihe ntọhapụ bụ ihe na-arụ ọrụ nke na-arụ ọrụ dị ka onye na-emekọrịta ihe n'etiti ebu na ngwaahịa emechara, a na-ejikwa ya n'ọtụtụ ọrụ ịkpụzi dị ka nkedo metal die, polyurethane foams na elastomers, plastic fiber mesikwuru plastics, injection kpụrụ thermoplastics, agụụ foamed. mpempe akwụkwọ na profaịlụ extruded. Ihe ntọhapụ ebu bụ kemịkalụ, okpomọkụ na nrụgide na-eguzogide, anaghị agbaji ngwa ngwa ma ọ bụ daa mbà, na-ejikọta ya na ebu na-ebufe na akụkụ nke emechara, na anaghị egbochi ihe osise ma ọ bụ ọrụ nhazi nke abụọ ọzọ.