channel scanner
... channel sand 河道砂 channel scanner 通道扫描器 channel scour 河床冲刷作用 ...
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CT扫描器包括一个不是特别窄的移动检测床，它可以将人慢慢地拖行至一个环形通道，其形状就像是一个巨大的甜甜圈。
The CT scanner consists of a moving couch, not particularly narrow, that slowly moves a person through a hoop that has a shape of a very large donut.
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