慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。
The dangerous type chronic otitis media occurs with pars flaccida and marginal perforations.
一种能产生穿孔纸带并在纸带边缘打印字符的电传打字接收机。
A teletypewriter receiver that produces perforated tape with characters along the edge of the tape.
慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。
The dangerous type chronic otitis media occurs with pars flaccid and marginal perforations.
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