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| 胸骨角 (位于胸骨柄与胸骨体连接处，微向前突，两侧与第2肋相关节。胸骨角是计数肋和肋间隙的重要标志，该处平主动脉起始处、气管杈、左主支气管与食管交叉处和第4胸椎体下缘) | |||
| 胸骨角 | |||
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