The mechanism (14) supports the short length refractory outlet tube (16) and the long length refractory flow protection tube (18) side by side.
该机构（14）并排支撑短尺寸耐火出口管（16） 和长尺寸耐火流动保护管（18）。
2
Objective: to summarize 10 cases of serious heart valve disease with refractory cardiac resuscitation and explore a new method of myocardial protection.