| 摘要 |
Method and system for measuring an opening at least partially defined by a surface. A plurality of target bodies are positioned about a circumference of a target body holder that is sized to fit within the opening. The target bodies are forced radially outward to cause at least one of the target bodies to be positioned against the surface. A geometric property of the opening is determined based at least partially on a location of at least one of the target bodies positioned against the surface.
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