两个接触有害化学品的主要途径是：吸入和吞食。
Two primary routes of exposure to hazardous chemicals are: Inhalation and Ingestion.
探讨超声雾化吸入曲马多在咽部手术后镇痛的效果，寻找曲马多新的用药途径。
Objective: to explore the analgesic effect of ultrasonic nebulization of tramadol for postoperative patients after accepted pharyngeal surgery, to find a new way of administration of tramadol.
侵入途径：吸入、食入、眼睛、皮肤接触。
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