Is this hovercraft the one that made its first public flight

Is this hovercraft the one that made its first public flight is this hovercraft____made its first public flight in 1959? One majoy () of this area is that the public transport is no this is the first machine we made和 this is the first machine 英语翻译This is the basement.Take the elevator one flight up and It’s reported that he made public at this decision at the la this one is (small)than the first one The first thing that children recongnize is that one object 英语翻译ConclusionsIn one of the first studies of its kind,this This is the one that I wanted. This is a b------- book than the first one. one is this first than smaller the怎么拼啊