1、
High stone walls topped with snaky concertina wire, set off at intervals by looming guard towers.
顶部装着蛇腹式铁丝网的高高的石墙, 被渐渐隐现的哨塔隔开.
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2、
Fanfold: Also called Accordion fold , Concertina fold , Over and back fold , Zigzag fold.
扇形摺: 亦称风琴摺, 之字摺.
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3、
Its main bridge-a huge concrete structure-now lies concertina ed on the riverbed.
钢筋混凝土结构的主要桥梁,被扭扁坍塌在河床.
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4、
But their words helped pierce the concrete and concertina wire of the Iron Curtain.
但是这些话穿透了铁幕的水泥墙和铁丝网.
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6、
每次脉冲放电，工具电极都在压电致动器的驱动下作伸缩运动，从而实现微进给。
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