E nwere ihe abụọ nkịtị n'elu efere, The kpaliri mpempe akwụkwọ Top efere na The Plastic mpempe akwụkwọ Top efere.
The galvanized mpempe akwụkwọ Top efere bụ ọgwụ kpụrụ na galvanized mpempe akwụkwọ, nke na-ventilated, bata n'ezi, okpomọkụ-dissipating, na-abụghị ileghara, mgbochi corrosive na inogide.
The plastic elu-ọsọ efere bụ injection-akpụzi na dị engineering plastik. The tree mgbidi thickened na-akpọlite iji gbochie tree si tilting na tilting na cylinder. The n'ozuzu efere bụ eguzogide mmetụta, ịka nká na deformation, na ike n'ụzọ dị irè inogide arọ nke sliver.