At about 200mph he will start the pump to deliver the HTP into the rocket.

在大约时速200英里时他将启动为火箭发动机传送htp的泵。

youdao

At about 200mph he will start the pump to deliver the HTP into the rocket.

在大约时速200英里时他将启动为火箭发动机传送htp的泵。

youdao