According to the work of a low pressure vacuum valves, ultra high vacuum valves and vacuum valves.
根据工作压力有低真空阀门、高真空阀门和超高真空阀门。
Under these conditions, a vacuum is indicated on the low pressure side.
在这些情况下，说明低压端存在一个真空状态。
Mold filling characteristics of Al alloy in vacuum lost foam low pressure casting (VLFLPC) under counter gravity condition were examined.
试验研究了反重力浇注条件下，铝合金消失模真空低压铸造的充型流动特性。
The Soviet RORSAT radar satellites were powered by a NaK-cooled reactor. Apart from the wide liquid temperature range, NaK has a very low vapor pressure, important in the vacuum of space.
相当大的温度范围内仍然是液态，此外，钾钠合金蒸气压非常低，这一点在真空条件下显得尤为重要。
By applying different pre-pressure, the speed, torque and temperature of the ultrasonic motor in low and high vacuum have been tested and compared with the normal condition.
施加不同的预压力在低、高真空环境下对超声电机的转速、转矩及温升进行测量并与常态下相比较。
Dilute (lean), dense and two phase vacuum conveying systems High and low pressure conveying systems Conveyor systems for bulk solids, powders and other granular materials.
稀释(倾斜的)，密集的和两相真空运输系统高压和低压运输系统该设备用于输送散装固体，粉末和其他的粒状材料。
Flexible reinforced hoses made from rubber and plastic for vacuum, suction, compressed air and low pressure fluids.
柔性增强软管由橡胶和塑料制成，主要用于真空，吸入压缩空气，低压流体应用。
A new expendable pattern casting (EPC) process, with vacuum and low pressure, was introduced.
介绍了一种新的铸造技术——真空低压消失模铸造的工作原理。
Glass shell made of a light bulb to keep the filament in a vacuum, or inert gas under low pressure, role is to prevent oxidation of the filament at high temperature under.
电灯泡外壳用玻璃制成，把灯丝保持在真空，或低压的惰性气体之下，作用是防止灯丝在高温之下氧化。
Thermal behavior of vacuum concentric tube annulus is a process involving combined heat transfer mode, in which the thermal conduction of low pressure gas plays an important role.
真空同心管套涉及传导、辐射等传热方式，其中低压气体的热传导非常复杂，是分析问题的关键。
Vacuum dust collection system is system of high negative pressure and low air flow.
简介：真空吸尘系统，是一种高负压、低流量的除尘系统的统称。
Vacuum dust collection system is system of high negative pressure and low air flow.
真空吸尘系统，是一种高负压、低流量的除尘系统的统称。
Structured packings are employed particularly in vacuum service where pressure drops must be kept low.
规则的填料是尤其在真空下被使用，在真空下压降必须保持很低的水平。
The results showed that although the vacuum smelting has strongly degassing capacity, the degassing effects is relevant to the relative humidity of compressed air in low pressure die casting.
结果表明，尽管真空精炼具有很强的除气能力，但低压铸造的除气效果与压缩空气的相对湿度有关。
Extraterrestrial Environment: How It Affects the Way Things Work or Do Not Work vacuum and high pressure, low and high temperature, gravity or lack of, geological uncertainty;
第二讲：太空环境：如真空或高压，低温或高温，高重力或低重力以及地质的不确定性是如何影响机械的工作性能的；
Extraterrestrial Environment: How It Affects the Way Things Work or Do Not Work vacuum and high pressure, low and high temperature, gravity or lack of, geological uncertainty;
第二讲：太空环境：如真空或高压，低温或高温，高重力或低重力以及地质的不确定性是如何影响机械的工作性能的；
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