Ihe omume a kachasị dochie ihe na ngwaọrụ eji akwakọ ngwaahịa ụlọ ọrụ, dochie warara nchara na PET nkwakọ ngwaahịa, ma kwadebe pneumatic ma ọ bụ igwe nrụpụta eletriki iji melite arụmọrụ nkwakọ ngwaahịa. Ọ na ọtụtụ-eji newsprint, mpịakọta akwụkwọ, na-acha ọcha osisi, ntekwasa akwụkwọ, akwụkwọ oyiri na ndị ọzọ na ngwaahịa.