Objective To observe the characters of the branches of the sigmoid-rectal arteries.

目的观察乙状结肠直肠动脉在上段直肠的分支分布特点。

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Objective To observe the characters of the branches of the sigmoid-rectal arteries.

目的观察乙状结肠直肠动脉在上段直肠的分支分布特点。

youdao