Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Vladimir Mikhailovich Petlyakov (Russian) (15 June 1891 <unk> 12 January 1942) bụ onye injinia ụgbọelu Soviet.  Ajụjụ: Olee mgbe a mụrụ Vladimir?
15 Julaị 1891