Lift check valve with a spring load can withstand light valveflap, flapvalve lift is not high.
升降式止回阀使用一个可承受弹簧载荷的轻量阀瓣,阀瓣的升程不高。
2
Objectives: Gastroesophageal flapvalve can be divided into a four-grade system and this system can well predict the prevalence of gastroesophageal reflux disease.
研究动机:胃食道皮瓣可区分为四级。而这种分类系统,可以预测胃食道逆流疾病的发生率。
3
Meanwhile, the flapvalve can be used to adjust weight, spring tension and the bottom outlet valveflapvalve opening size to determine the pressure and open and close time.