First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮喷射，已淘汰；然后是涡轮螺旋桨引擎，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺式引擎，现小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小飞上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小飞上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，可小飞上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮式引擎，现仍飞机上看到。