无导管的 ductless
无导管风扇 unducted fan
一次性使用无菌导尿管 the disposable Foley Catheters
无缝棱镜导光管 seamless prism light guide
结论腮腺主导管及深叶的保留与腮腺肿瘤的复发无内在联系。
Conclusion the recurrence of parotid tumor had no relation to the retaining parotid master duct and deep lobe.
多层螺旋ct和磁共振都是无创性的，性价比较高的心脏导管诊断冠心病的替代技术。
Multislice ct and MRI have been proposed as noninvasive, cost-effective alternatives to catheterization for diagnosing CAD.
结果中心静脉导管与粗硅胶管行胸腔闭式引流治疗自发性气胸疗效相近，无显著性差异；但粗硅胶管行胸腔闭式引流治疗并发症多。
Results Their curative effects were similar without obvious differences, but the thoracic closed drainage of the thick silica gel catheter had more complications.
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