Dị ka ihe a na-ebuli ngwa ngwa, crane gantry abụọ nwere njirimara nke ibu ibu ibu, nnukwu ogologo na ọrụ kwụsiri ike. A na-ejikarị ya eme ihe n'ọdụ ụgbọ mmiri, ụlọ nkwakọba ihe, ígwè, ụlọ ọrụ kemịkalụ na mpaghara ndị ọzọ. Ụkpụrụ nchekwa ụkpụrụ imewe: Mgbe ị na-emepụta crane gantry, ndị ...
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