| 摘要 |
The application discloses embodiments of an apparatus comprising a base having a top, a bottom, a proximal side and a distal side, the bottom being attachable to a scanner, an adjustable proximal sight on or near the proximal side, the proximal sight including a sighting notch therein, and a distal sight on or near the distal side, the distal sight being substantially aligned with the proximal sight and including a mount attached to the base and a tubular sighting element attached to the mount. Other embodiments are disclosed and claimed.
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