Duplex nail
01
双头钉, 双头钉子
a nail with two heads, designed for temporary or removable fastening purposes
例子
The contractor used duplex nails to secure the temporary scaffolding until the permanent structure was in place.
承包商使用双头钉来固定临时脚手架，直到永久结构就位。
To assemble the wooden frame, he hammered in several duplex nails for easy removal later.
为了组装木制框架，他钉入了几个双头钉以便日后轻松移除。
