1·GD-J series high-vacuum flap valve is used to cut off or connect air stream in vacuum system.
GD - J系列高真空挡板阀是用于真空系统中用来切断或接通气流之用。
2·Lift check valve with a spring load can withstand light valve flap, flap valve 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。
3·Flap valve is mainly installed in the end of drainage pipeline to prevent extra water flow backward.
拍门主要安装在排水管道的尾端，用于防止外水倒灌。
4·This valve is normally automatic work, in a direction of flow of fluid under pressure, open the flap valve;
通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；
5·Based on a systematic analysis of the movement of the flap valve, a mathematical model with constraint conditions and objective functions is established.
文中通过对拍门运动的系统分析，建立了带有约束条件和目标函数的数学模型。
6·Butterfly valve is also called a flap valve, is a simple structure of the regulating valve, but also can be used for low pressure pipeline medium switch control.
蝶阀又叫翻板阀，是一种结构简单的调节阀，同时也可用于低压管道介质的开关控制。
7·Objectives: Gastroesophageal flap valve 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。
8·Also known as butterfly flap valve imports, is to open and close with a round disc with the stem pieces and turn to open, close and adjust the fluid channel of a valve.
进口蝶阀又叫翻板阀，是用圆形蝶板作启闭件并随阀杆转动来开启、关闭和调节流体通道的一种阀门。
9·Flap valve cover seals are required when there is carbide reactor welding, sealing surface with thread sealing, to ensure the reliability of sealing and prevents scarring.
阀瓣密封根据需要时封面均堆焊接有硬质合金，密封面采用线密封，保证密封的可靠性，并可防止结疤。
10·Meanwhile, the flap valve can be used to adjust weight, spring tension and the bottom outlet valve flap valve opening size to determine the pressure and open and close time.
同时，可以利用调整阀瓣的自重、弹簧的弹力以及阀瓣的底孔大小来确定阀门的开启压力和启闭时间。