The catheter is then withdrawn back into the right ventricle , with the first disc positioned against the left ventricular wall and the connecting shaft filling the hole created by the rupture 导管接着后退进入右心室,随着第一片定位在左心室壁上,连接轴填充心脏破裂所形成的缺损。
When flux appears liquid and transparent on both tube and valve , start sweeping flame back and forth along axis of joint to maintain heat on parts to be joined , especially toward the base of the valve socket 当管道和阀门上的焊剂都变成液状和透明时,则开始沿着连接轴向前后来会扫着火焰,保持连接部件的温度,特别是阀门承插口底部的温度。