围栏顶部装有螺旋刀刺铁丝网。

The fence is topped with ___concertina wire.

她在街头用六角手风琴演奏了一首民歌。

She played a folk song on her ___concertina at the street corner.

被压扁的易拉罐像手风琴一样皱成一团。

The crushed can ___concertinaed into a wrinkled mess.