ISI NKEWA EZIOKWU
Ụdị F2 super spacer e mere maka iji na indexing na ma kehoraizin na rertical position.Ọ bụ ihe kasị mma na-eji maka igwe-egwe ọka, egweri igwe,-egwupụta ihe igwe na planer etc.The divinsions na 2,3,4,6,8, A na-anabata 12,24 site na efere motched, enwere ike ịme dexing angular ọ bụla a chọrọ site na iji mgbanaka gụsịrị akwụkwọ na spindle na verner.
