[机] 瓣阀；片状阀
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。
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。
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。
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；
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。
|clack valve/disc valve;[机]瓣阀；片状阀
"flap valve" 是一种特殊结构的阀门，以下是详细解释：
flap valve 是一种通过铰链或枢轴连接的单侧开合阀门，其结构通常为片状或瓣状。这种阀门依靠流体压力或重力实现自动启闭，常见于单向流动控制场景。
单词flap可以作为名词或动词使用，以下是详细的解释：
例句：The flag on the pole was flapping in the wind. （旗杆上的旗子在风中飘扬）
例句：The bird's wings flapped as it took off. （鸟儿在起飞时拍打翅膀）
例句：He lifted the flap on the box and looked inside. （他打开盒子上的盖子，往里面看了看）
例句：She flapped her hands in excitement. （她兴奋地挥舞着双手）
例句：The butterfly flapped its wings and flew away. （蝴蝶拍打着翅膀飞走了）
例句：He flapped the newspaper to get rid of the dust. （他拍打报纸以除去灰尘）
例句：She flapped around the kitchen, not sure what to do. （她在厨房里东张西望，不知道该干什么）
flail, beat, wave, flutter
still, motionless, steady
单词valve通常作为名词使用，以下是详细的解释：
例句：The plumber fixed the valve on the water pipe. （管子上的阀门被管道工修好了）
例句：The singer's voice was so beautiful because she had excellent control over her vocal valves. （歌手的声音非常美丽，因为她能很好地控制她的声门）
例句：The doctor said that her heart valve was leaking and needed to be replaced. （医生说她的心*********出现了漏水现象，需要更换）
gate, damper, spigot
leak, breach, opening
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