Nputa mmanu
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Ihe nzacha na-egwefoto na iji ihe nzacha mmiri
Mmanụ a na-enyocha ya bụ nzacha iji wepu onye na-emetọ ya site na mmanụ mmanụ, mmanụ na-esi na mmanụ, ma ọ bụ mmanụ hydraulic. Naanị mmanụ dị ọcha nwere ike iji hụ na arụmọrụ injin na-agbanwe agbanwe. Yiri dị ka mmanụ mmanụ ọkụ, ihe nzacha mmanụ nwere ike ịbawanye arụmọrụ engine na n'otu oge belata mmanụ.
