工作压力由液压加压，弹簧保压。
变量泵可在长的保压时间内节省能源。
A variable displacement pump could save energy during the long holding time.
保压间就是产品重量开始稳定时的时间。
The holding time will be the time when the part weight start to be stable.
接着讨论热水锅炉的特点和防蚀、保压措施。
Some special features of the hot water boiler and measures to prevent corrosion and to maintain pressure are discussed.
如有必要可用干燥氮气置换反应器，并保压。
If necessarily, nitrogen dryer exchange reactor could be used with keeping presure.
和高压保压法相比，本法具有现实的工业应用前景。
Compared to high pressure injection molding, the method has good perspective in practical application.
保压时间太短：重量不足，产品内部空洞，尺寸偏小。
Too short holding time: Not enough weight, empty inside, small dimension.
输入预压、波头、焊接时间、保压、焊接电流等参数。
Input preloading, wave head, welding time, the pressure, welding current parameters.
在同样的压型压力下，保压时间对合金性能的影响较弱。
The influence of dwell time for alloy performance is weak comparatively.
该输氧器结构简单、安全可靠、贮氧量大、保压时间长。
The oxygen respirator is with simple structure, high reliability, large oxygen storage and long time for keeping pressure.
电机停止，活塞杆能自锁在任意位置上，处于保压状态。
When the motor stops, the piston rod can self-lock at any locations, in the state of pressure keeping.
重锤式自动保压型系统中，蓄能器用作系统压力的补偿。
Steelyard weight type automatic constant voltage system, the accumulator serves an the system pressure compensating.
保压时间的确定以浇口冷凝为依据。通过产品称重来确定。
Holding time is determined by the solidification time of the gate. We decide it according to the weight.
在规定的“保压”周期后，激励通道21，测量产生的电流。
After a specified "soak" period, energize Ch. 21 to measure the resulting current.
在保压阶段采用了压力随时间成正比下降的近似PVT控制。
An approximate PVT control making pressure to decrease proportionally to time is adopted for holding pressure.
随着保压时间延长和温度升高，梨汁中PPO相对活性逐渐降低。
The activity of PPO in juice decreased step by step with the increasing of heating temperature and pressure holding time.
保压时间大约是冷却时间的80%，冷却时间常常小于其设定值。
The packing time is about 80% of the cooling time which itself is often less than that which is set.
由于先导卸荷阀5内的单向阀作用，可以实现系统保压而油泵卸荷。
The pilot unloading valve 5 of the one-way valve can be achieved system-pressure pump and unloading.
压药压力、加压速度、保压时间等重要工艺参数都直接影响其质量。
The important parameters such as pressing powder pressure, pressing speed and holding pressure time etc, will affect directly the quality of initiating explosive device.
液压系统可以采用液控单向阀、蓄能器、液压泵等多种形式实现保压。
A single - direction valve controlled by liquid, an accumulator and hydraulic pumps can be used to keep pressure in hydraulic systems.
随着保压时间的延长和温度的升高，桃汁中多酚氧化酶相对活性逐渐降低。
The activity of PPO in the juice decreased gradually with the rise of heating temperature and the extension of pressure holding time.
挤压成型过程中原材料、挤压力、保压时间和成型温度对制品的品质影响较大。
The raw materials, extrusion pressure, pressure holding time and molding temperature during extrusion moulding have great effects on the quality of products.
重锤式自动保压锁定性系统中，蓄能器用作系统压力的补偿和锁定油缸的退锁。
Steelyard weight type automatically guarantees presses in the locking system, the accumulator serves as the system pressure to compensate and to lock the cylinder to back to lock.
应用热力学理论对用于深海微生物取样器保压的皮囊式蓄能器快速增压过程进行分析。
Thermodynamics theory gastight was used to analyze the quick plenum process of bladder accumulator used for deep sea microbe gastight sampler.
通过对原有液压机保压系统的分析，指出它的不合理之处，并对此系统进行改进设计。
The original pressure-keeping hydraulic system was analyzed and its faults were pointed out. The improvement design of pressure-keeping hydraulic system was presented.
分析了实现在线浓缩取样的关键技术，研究了蓄能器预充压力和采样筒保压效果的关系。
Key techniques of on-line concentrated sampling are analyzed and relations of accumulator precharge pressure and pressure-retaining results are studied.
其中，机械系统由试验台架、液压加载泵站、试验介质增压保压装置和传感器等部件组成；
The mechanical system is composed of testing mechanical assembly, hydraulic loading pump station, pressure increasing and holding device for tested media, and sensors.
提出了将螺旋千斤顶加压的硫化器改造成液压千斤顶加压、保压的液控硫化器的改进方案。
Puts forward the hydraulic control scheme that spiral jack is reformed hydraulic jack to raise pressure and preserve pressure.
无论是对于垫层方案或是保压方案，是否设置伸缩节和止推环对蜗壳应力状态影响均较小。
For MSCL and MHWH, the setting up of expansion joint and anti-thrust ring will not much affect the stress distributions of SC and surrounding concrete.
无论是对于垫层方案或是保压方案，是否设置伸缩节和止推环对蜗壳应力状态影响均较小。
For MSCL and MHWH, the setting up of expansion joint and anti-thrust ring will not much affect the stress distributions of SC and surrounding concrete.
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