post bracket
... 邮局 Post box 柱形托架 post bracket 弯曲后强度 post buckling strength ...
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这些试验汽车看上去和道路上其它汽车差不多一样，除了车顶托架上安装有一个烟囱状圆柱形设备——它起着汽车“眼睛”的作用。
The experimental vehicles look much the same as others on the road, apart from chimney-like cylinders mounted on brackets above the roofs that act as the cars' eyes.
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