To stiffen the shells, we added narrow carbon covered foam ribs on the inside.

僵硬的炮弹，我们增加了狭隘的碳泡沫肋骨涵盖在里面。

youdao

To stiffen the shells, we added narrow carbon covered foam ribs on the inside.

僵硬的炮弹，我们增加了狭隘的碳泡沫肋骨涵盖在里面。

youdao