在镜片的下侧和背侧，分别装有供氧管和吸痰管，可在暴露声门的同时供氧和吸痰。
An oxygen -supply pipe and suction tube are settled on the bottom and side of tongue-spatula to provide oxygen and absorb phlegm simultaneously on exposure of glottis.
结果：囊性淋巴管瘤的影像学特征为头颈部两侧或背侧的囊性包块，呈单囊或多囊表现，回声或信号可均匀或不均匀，病变范围可延伸至枕部或肩背部及纵隔。
Results:The cervical lymphangioma in fetus was characterized by a cystic mass, single or multilocular with septations, on the back or both sides of the neck, the echo and signal is uniform or not.
本文用透射电镜对大鼠延髓中央管室管膜作了观察，发现延髓中央管室管膜存在构造分区，即中央管背侧部室管膜细胞与腹侧部室管膜细胞在分布和排列上有差异。
Observation of central canal ependyma of medulla oblongata in rat was carried out under transmissive electron microscope in the present study. Tanycytes were found mainly in the dorsal ependyma.
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