根据回流压力的变化规律，采取异型排气口、预进气结构等措施减小回流冲击。
The change of back-flow pressure, deformed exhaust hole, pre-inflow structure and so on can be adopted to reduce back-flow impact.
活门的斜角位设计，当回流压力越大，活门越能紧闭，发挥最佳的防回流功能。
The design of the slanting valve trap keeps the valve door tightly closed when the pressure from the backflow gets higher, allowing the valve trap to perform its best function.
如今，有如此多的外国公司积累了如此多的人民币，那么建立人民币回流渠道和一个人民币的离岸市场的压力也就越来越大。
Now, with so many foreign firms accumulating so much RMB, pressure is building to establish RMB backflow channels and an RMB offshore market.
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