When size of choke line is not variable, the first and secondcirculation rate increases with well depth increasing.
对于某一特定尺寸的节流管线，第一循环周及第二循环周的最大流量随着水深的增加而增加；
2
At the entrance of the oven, the exhaust air equipment discharges volatilized solvent in order to avoid exhaust gas participating in the secondcirculation and ensure safety.
烘箱入口处安装前置排风，可将初期挥发的溶剂排出，废气不参加二次循环，确保安全。
3
A study in the journal Circulation found that more than a quarter of heart attack sufferers did not comply with diet and exercise advice even though it can reduce the risk of a second attack by half.