Ihe mejupụtara kreenụ dị n'elu trolley okpukpu abụọ nwere ọtụtụ ihe dị ka moto, ndị na-ebelata ihe, breeki, sensọ, sistemu njikwa, usoro ibuli elu na breeki trolley. Isi ihe ya bụ ịkwado na ịrụ ọrụ usoro ebuli elu site na ihe owuwu akwa mmiri, nke nwere trolleys abụọ na isi ọkụ abụọ ...
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