每天他都带着一模一样的三明治去学校——两片什么也不夹的面包。
Each day, he would arrive at school with the exact same sandwich: two slices of bread with nothing in between.
提出一种车窗防夹的多模光纤传感系统，该系统安装在车窗框内，并基于斑纹图样的变化来获得信号。
A multi-mode optical fiber sensor system is proposed, which is installed in the window frame and whose sensor signals are based on variation of a speckle pattern.
凸模用弹性夹套固定，模具对中性好，更换凸模方便。
The punch was fixed by a spring clamp sheath, so that the die was good coaxial and convenient for exchange of the punch.
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