foam booster的意思|示意

The object was too light to be a brick, but it was the same density as a piece of foam from a solid rocket booster.

这一物体太轻了而不可能是一个砖，然而它和固体燃料助推器上的泡沫的密度是相同的。

The initial Shuttle design predicted neither foam debris problems nor poor sealing action of the Solid Rocket Booster joints.

航天飞机的初始设计即没有预料到泡沫脱落问题也没有预料到固体火箭助推器连接密封性能这么差。