1)  air pressure valve

2)  reduction pressure valve

1.
The structure and principle of JTY—1 type air reduction pressure valve for double wind pipe of installation in the raising speed locomotive are described.

3)  compressed air valve

4)  pressurevaccuum valve

5)  air pressure regulator valve,pneumatic pressure control valve

6)  air pressure

1.
Meanwhile,the experiment is conducted and the air pressure inside the swirler and the influence of the swirler′s structure upon yarn hairiness are analyzed.

2.
AIM To establish a method of cultured neuron injury models by high air pressure for the study of injured cell group or single cell in the central nervous system (CNS).

3.
On the bases of network algorithm and time differential method,a calculation model is studied for air pressure inside the fuel tanks and a simulation method of vent system in maneuver course is presented.

 溢流阀 减压阀 顺序阀 控制油路的特点 通过调整弹簧的压力控制进油路的压力，保证进口压力恒定，p2＝0 通过调整弹簧的压力控制出油口的压力，保证出口压力p2稳定 直控式－通过调定调压弹簧的压力控制进油路压力；夜控式－由单独油路控制压力 出油口情况 出油口与油箱相连 出油口与减压回路相连 出油口与工作回路相连 泄漏形式 内泄式 外泄式 内泄式 进油口状态及压力值 常态 常闭（原始状态） 常开（原始状态） 常闭（原始状态） 工作状态 进出油口相通，进油口压力为调整压力 进油口压力低于出油口压力，出油口压力稳定在调定值上 进出油口相通，进油口压力允许继续升高 联接方式 并联 串联 实现顺序动作式串联作卸荷阀用时并联 功用 定压、溢流或安全作用限压、稳压、保压 减压、稳压 不控制系统的压力，只利用系统的压力变化控制油路的通断 进油腔压力p1控制阀芯移动 出油腔压力p2控制阀芯移动 进油腔压力p1控制阀芯移动