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- GD high vacuum flapper valve is used to put through or cut off the airflow in vacuum pipeline. GD型高真空挡板阀用于接通或切断真空管路中的气流。
- According to its shaft seal structure, high vacuum flapper valve is classified into GD-J rubber shaft seal type and GD-J(b)bellows shaft seal type. 高真空挡板阀按轴封结构可分GD-J型橡胶轴封和GD-J(b)型波纹管轴封两种。
- GDHigh Vacuum Flapper Valve GD high vacuum flapper valve is used to put through or cut off the airflow in vacuum pipeline. GD型-高真空挡板阀 GD型高真空挡板阀用于接通或切断真空管路中的气流。
- Electro High Vacuum Flapper Valve GDC-JQelectro high vacuum butterfly valve uses electromagnetic force to directly drive valve disc working. thus to make valve opened ro closed. GDC-J型电磁高真空挡板阀是以电磁力为动力直接带动阀板动作，使阀门开启或关闭。
- The equalizing port assembly features a structural support member in the form of a retainer key (80) that is secured to the flapper valve member both axially and radially. 补偿口组件特征在于保持器键(80)形式的结构支撑元件，保持器键(80)在轴向和径向上都固定到挡板阀元件上。
- GDQ pneumatic high vacuum flapper valve uses solenoid directional valve to change the direction of air passage,controls the actuating cylinder to drive the valve openedclosed. GDQ型气动高真空挡板阀是通过电磁换向阀改变气路方向，控制执行气缸驱动阀门作启闭运动。
- GDC-5 electro high vacuum flapper valve is mounted in vacuum pipeline to put through or cut off the airflow in vacuum system, or used as a charging vale. 简单介绍： GDC-5型电磁高真空挡板阀是连接在真空管路上，用来接通或截止真空系统中的气流，或作充气阀用。
- A flapper valve assembly is described having an equalizing port assembly (32) with a bleed valve member (64) that is moveable between an open position and a closed position. 本发明公开了一种挡板阀组件，挡板阀组件具有补偿口组件(32)，补偿口组件(32)带有可在打开位置与关闭位置之间移动的排放阀元件(64)。
- Electro High Vacuum Flapper Valve GDC-5 electro high vacuum flapper valve is mounted in vacuum pipeline to put through or cut off the airflow in vacuum system, or used as a charging vale. GDC-5型电磁高真空挡板阀是连接在真空管路上，用来接通或截止真空系统中的气流，或作充气阀用。
- GDQ pneumatic high vacuum flapper valve uses solenoid directional valve to change the direction of air passage, and controls the actuating cylinder to drive the valve opened and closed. GDQ型气动高真空挡板阀是通过电磁换向阀改变气路方向，控制执行气缸驱动阀门作启闭运动。
- GDC-5Electro High Vacuum Flapper Valve GDC-5 electro high vacuum flapper valve is mounted in vacuum pipeline to put through or cut off the airflow in vacuum system, or used as a charging vale. GDC-5型-电磁高真空挡板阀 GDC-5型电磁高真空挡板阀是连接在真空管路上，用来接通或截止真空系统中的气流，或作充气阀用。
- GDC-] Electro High Vacuum Flapper Valve GDC-JQelectro high vacuum butterfly valve uses electromagnetic force to directly drive valve disc working. thus to make valve opened ro closed. GDC-J电磁高真空挡板阀 GDC-J型电磁高真空挡板阀是以电磁力为动力直接带动阀板动作，使阀门开启或关闭。
- In order to improve the reliability of servo system, a triplex electro-hydraulic servo actuator system with three torque motors, three jet flapper valves and three sets of feedback components is designed. 摘要为了提高伺服作动系统的可靠性，设计了一种三余度的电液伺服作动系统，将伺服阀的力矩马达、喷嘴挡板阀、系统的反馈元件等做成一式三份。
- The letter was written on a single sheet of paper. 这封信只用一张纸写成。
- One single, second class, to winchester, please. 买一张去温撤斯特单程二等票。
- He got over the stream with a single leap. 他一跃就跳过了小溪。
- Control System Design for a New Type of Double Nozzle Flapper Valve 一种新型双喷嘴挡板阀控制系统设计
- The bridge crosses the river in a single span. 河上那座桥是单跨桥。
- Do you want a single or a return ticket? 你要单程票还是往返票?
