1. A flexible tube, usually containing a trocar at one end, that is inserted into a bodily cavity, duct, or vessel to drain fluid or administer a substance such as a medication. 
   套管，插管一根通常一端有套管的柔韧管子，被插入体腔、导管或血管以排出液体或服用一种物质，如药物等

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• 1. 套针，套管针
  tRNA (transfer RNA) 转移核糖核酸...trocar 套针，套管针...trocar and cannula 套针套管
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• 2. 套针
  trobicin vial 注射用淋必治...trocar 套针...trocas 商用马蹄螺
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• 3. 胆囊穿剌套管针
  gall-bladder...trocar 胆囊穿剌套管针...gallamine triethiodide 加拉碘铵
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• 4. 也可在右下腹套管针
  系膜不作结扎。也可在右下腹套管针（trocar）导入3/0可吸收线在阑尾根部与系膜间穿过导出，体外打结，...
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