第三组将左侧腮腺导管内置管固定于皮肤。
闰管为腮腺最长，颌下腺次之，舌下腺最短。
The intercalary duct of parotid gland is longer than the salivary glands, while the sublingual gland is the shortest.
闰管为腮腺最长，颌下腺次之，舌下腺最短。
The intercalary duct of parotid gland is longer than the salivary glands, while the sublingual gland is the shortest.
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