复合材料风管foil-insulant composite duct 防火风管refractory duct 净化空调系统洁净室(区域)的洁净度等级应符合设计的要求。
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Objective To investigate the practicability and safety of cholangioscopic holmium:YAG laser lithotripsy for refractory common bile duct residual stones.
目的探讨经胆道镜钬激光碎石治疗胆总管难取性残留结石的实用性及安全性。
A combined type air duct assembled by refractory plates is developed and designed.
开发设计了由耐火板拼装的组合式风管。
To explore the feasibility of treating the refractory biliary duct stones and ureterolith by laparoscopy through combined choledochofibroscope with electronic gastroscopy.
目的探讨腹腔镜下胆道镜联合胃镜取胆管及输尿管难取结石的可行性。
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