Air is forced up from the buoy counterweight tube during downward motion causing the balls to seal the air ports in the valve, thus forcing the air to flow into the whistle. 空气在向下运动过程中受到浮标向上的推力,使阀球将阀门里的气舱密封住,这样迫使气流进入雾笛。
However, the autoclave-process cured deformation is unavoidable if stacking design only satisfy the requirement of structure. Forced assemblage may lead to lots of problems, such as assemble stress, seal failure and so on. 但仅仅按结构要求进行铺层设计,则在共固化整体热压成型过程中不可避免的会产生固化变形,强迫装配必然引起装配应力、密封不好等问题。