E4 Ngwa pụrụ iche maka arịa ụlọ elu (obere ọdụ ụgbọ mmiri nwere ihe mkpuchi nrụgide) nhọrọ kacha mma maka igwe ịkpụ

.A na-emecha akara ngosi akpaaka, ntinye ihe, mmeghe ihe kachasị mma, oghere oghere kwụ ọtọ, na ntinye ihe na-akpaghị aka na-emecha n'otu oge, usoro ahụ adịghị akwụsị akwụsị, a na-emeziwanye mmepụta ya.
.Nhazi nke njikwa njikwa igwe bụ enyi na enyi, onye ọrụ nwere ike ịmalite ọrụ ahụ mgbe ọzụzụ dị mfe na-enweghị ndị ọrụ nwere nkà.
.Igwe ahụ na-aga ngwa ngwa na nke ọma, na-enyere gị aka ịbawanye mmepụta
.Ngwaahịa ahụ na-anabata ngwa ọrụ akpaka dị elu na-agbanwe spindle, otu sistemụ mbanye ọrụ yana onye na-ebelata mbara ala nwere arụmọrụ kwụsiri ike
Tebụl bụ tebụl mgbasa ozi agụụ, nke nwere ike ịgbasa ihe dị iche iche nke mpaghara

Nkeji a nwere ọrụ
Ihe na-efesa nkewa → tupu egwe ọka → kpo oku infrared → gluing ite gluing (gụnyere sol ngwa ngwa) 1 → welt 1 → gluing ite gluing
(gụnyere sol ngwa ngwa) 2-ịgbado ọkụ 2-ngwa ngwa n'ihu na azụ trimming → siri ike trimming → mmecha trimming → 14 moto profiling trimming na otu scraping
Edge → waya gbajiri agbaji → nchacha ewepụghị → ihe na-agba mmiri → polishing okpukpu abụọ (polishing 1, light 2)