Camera extension: The length of bellows in a process camera.

相机伸长度：制版照相机的暗箱长度。

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Camera extension: the length of bellows in a process camera. It is the distance between the lens diaphragm and the image plane.

暗箱：制版照相机上可以伸缩的部份，它连接起镜头和影像平面。

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Using a camera mounted on an extension pole , photograph the top of the vehicle, including roof, hood and trunk areas.

使用相机装在一个延长杆，照片上方的车辆，包括屋顶，遮光罩和主干地区。

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