IGH usoro swing reducer nwere dịgasị iche iche nke nnyefe ratio na mmepụta torque, ya mere mgbanwe na iche iche ngwa.Slewing a bụ otu n'ime ngwaahịa hydraulic ọhụrụ anyị ewepụtara.Ọ na-akawanye ọgbọ ikpeazụ ya na ngwaahịa ndị yiri ya dị na ahịa, n'ihi nnabata nke teknụzụ hydraulic mebere onwe anyị kachasị ọhụrụ.Maka ozi ndị ọzọ, biko kpọtụrụ ndị injinia anyị.