S-IVB
- 网络第二级;第三级;道格拉斯;行器公司
S-IVB-
The S-IVB stage has its single engine gimbaled in pitch and yaw .
S-IVB级有一个单独摆动发动机来作俯仰和偏航。
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This same feature is incorporated in the S-IV and the S-IVB stages .
S-IV和S-IVB级包括了一些同样的特点。
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Located atop the S-IVB , which is the third stage of the Saturn V , is the guidance and control equipment for the launch vehicle .
安装在土星v第三级S-IvB顶部的是发射飞行器的导航和控制设备。