The other type doesn't use X-rays but instead a technology called millimeter-wave scanning.

另外一种不使用X射线，而是采用了一种叫做毫米波扫描的技术。

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The millimeter-wave machine is grayish-white and is more cylindrical.

而毫米波扫描仪则是灰白色的，有些像圆柱形。

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Millimeter wave scanners beam radio waves over the body to create a three-dimensional image.

毫米波长扫描仪发射无线电波到人体表面，产生一个三维图像。

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These are the clear, cylindrical scanners using millimeter wave technology and sold by L-3 Communications.

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Transmissions In the millimeter wave band are easily absorbed by rain drops, humidity has significant impact.

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In the U.S., the TSA uses both types of scanners: 250 X-ray scanners and 264 millimeter wave scanners.

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