Existing scanners usually have but a single X-ray tube. This is rotated around the patient, taking pictures as it goes.

现存的放射机通常只有一个X射线管，围绕一周患者进行拍摄。

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Better precision X ray tube, and wider analysis scope, long lifetime up to 10 years.

激发源X射线光管精度更高，范围更宽，使用寿命长达10年以上；

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Rotating around you, the x-ray tube and electronic x-ray detectors are located opposite each other in a ring, called a gantry.

有个称为龙门的环状物在你周围旋转，环上有若干对X射线管和电子X射线探测器在两侧。

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Existing scanners usually have but a single X-ray tube.

ECONOMIST: Modern X-ray technology

Butter a 10-x-4-inch tube pan with a removable bottom.

NPR: Two Centuries of 'Baking in America'

These printers use something like a toothpaste tube of plastic or other material held vertically in an X-Y plotter that squirts out thin layers of tiny dots of material that build up, layer by layer, to produce a 3D replica of the computer-generated design.

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