[名词解释] 皮下气肿

干啰音 潮式呼吸 漏斗胸 铅线 正常成人的QRS波群时限多为（） ["0.04～0.08s","0.04～0.10s","0.06～0.10s","0.08～0.10s","0.08～0.12s"] 皮下气肿