File:Fourpointprobe GMR.png
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![File:Fourpointprobe GMR.png](https://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Fourpointprobe_GMR.png/800px-Fourpointprobe_GMR.png?20150705214146)
Size of this preview: 800 × 508 pixels. Other resolutions: 320 × 203 pixels | 640 × 407 pixels | 1,024 × 650 pixels | 1,280 × 813 pixels.
Original file (1,280 × 813 pixels, file size: 193 KB, MIME type: image/png)