我感到很奇怪，在如何轻和强烈的环氧玻璃纤维，这是真的！

I am very surprised at how light and strong this epoxy fiberglass really is!

youdao

我感到很奇怪，在如何轻和强烈的环氧玻璃纤维，这是真的！

I am very surprised at how light and strong this epoxy fiberglass really is!

youdao