矩形风管的圆形当量
circular equivalent of rectangular duct
颈部水平未特指血管的损伤
Injury of unspecified blood vessel at neck level
颈部水平其他血管的损伤
Injury of other blood vessels at neck level
颈部水平多处血管的损伤
Injury of multiple blood vessels at neck level
井筒冻结管断管的处理
Treatment of shaft freezing pipe broken
晶闸管的光纤触发技术
Thyristor Triggered with Fiber
晶体管的微型结构
transistor microstructure
经外周插管的中心静脉导管
peripherally inserted central catheter