I will find a technology that has gone extinct, some bronze helmet, or chariot part or quill pen, something that definitely isn't being made anymore anywhere.

我会给你找出来，肯定有种技术已经灭绝了，再也不应用了，铜盔啊，战车啊，鹅毛笔啊。

youdao

Anyway, if you imagine sort of putting on a modern football helmet, with that mask in front of you, you would begin to get an idea, only begin to get an idea of what it was like to have that bronze helmet on your head.

总之,如果你戴着一个现代橄榄球头盔,前面还有面具,你就能稍微体会一下那种感觉了,但这还是跟铜质头盔的感觉,相去甚远的

耶鲁公开课 - 古希腊历史简介课程节选

He has on top of his head a helmet made of bronze, perhaps weighing about five pounds, these are approximate; they would have differed from person to person to some degree.

他的头部有铜质头盔,头盔大概重五磅,这只是大概的重量,实际重量因人而异

耶鲁公开课 - 古希腊历史简介课程节选

On the front cover of the Fischer catalog is a striking bronze facial mask of a Roman helmet from the first century that could be a modern sculpture.

WSJ: Collecting: Antique Arms and Armor Auctions Recall Ancient Warriors