Kedu ka esi agbapu oghere conical a na efere MS & SS? Anyị nwere nzọụkwụ atọ, anyị na-ahọrọ atọ nkọwapụta mkpọpu ibe n'ikuku efere, nke kacha nwere ike ịbụ 20mm ọkpụrụkpụ. Dịka ọmụmaatụ, mgbe anyị na-egwupụta otu efere nke nwere ọkpụrụkpụ 20mm, anyị na-ebu ụzọ na-eji nkedo nke etiti na-egwupụta omimi nke 18mm, wee jiri obere ihe na-egwupụta ihe na-egwupụta efere 2mm ikpeazụ, n'ikpeazụ na-eji nnukwu ihe na-egwupụta ihe na-eme ka oghere dị elu buru ibu. ruo omimi nke 10mm. N'ezie efere efere na-adabere na ihe ndị ahịa chọrọ, anyị na-eji ihe na-emepụta ihe na-ebubata, nke a pụrụ ịhụ na ahịa china adịkarịghị, ọ bụ ya mere anyị ji nwee ike ịme oghere conical maka ndị ahịa anyị.