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You can use the common technique with the poles to measure the slope angle like discribed by @EverythingRightPlace. There is also a ski-pole-sticker that you can attach to your pole and then simp...
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You can use the common technique with the poles to measure the slope angle like discribed by @EverythingRightPlace. There is also a ski-pole-sticker that you can attach to your pole and then simp...