Igwe ọkụ ọkụ servo rocker nwere ọgụgụ isi na igwe na-egwupụta ihe nwere ogwe mmetụ, ngbanwe ihe siri ike.
Meiwha Electric Tapping Machine, were usoro ọgụgụ isi servo eletrik kachasị mma.A na-eji ígwè, aluminom, plastik osisi na ịkụ aka ndị ọzọ.