试验结果表明，铸铁件流动前沿不仅存在明显的气隙，而且采用聚苯乙烯模样材料，负压下浇注时，其气隙压力低于1个大气压。
The results indicated that there exists obvious gas gap in molten iron flowing front, and the pressure in gas gap with EPS pattern during vacuum pouring is less than 1 a tm.
试验研究了浇注后型腔压力对消失模铸造的铝件表面状态、力学性能影响的趋势。
Influence of pressure applied on the mold after pouring on the surface status and mechanical properties of aluminum castings in lost foam casting is investigated.
适当提高外加压力和浇注温度有助于渗流过程的进行，但过高的浇注温度和压力对渗流过程都是不利的。
The penetrating casting can be promoted by properly increasing the pressure applied and pouring temperature, but disturbed if pouring temperature and the pressure applied were too high.
对石膏特性、灌浆、硬化机理、脱蜡、焙烧、浇注和压力对结晶过程的影响作了较进一步的分析。
It takes further steps to analyses influence of character of plaster, grouting, harder mechanism, DE - waxing, roast, casting and pressure on crystal process.
包紧力的大小与铝液浇注温度、成形压力、孔径尺寸、 模型材料的物理性质等有关。
Quantity of enclosed strength is due to cast temperature, shaping pressure , hole dimension, physical property of die material, etc.
设计了一种新的气隙压力测试方法，连续测试了浇注过程中的气隙压力。
A new testing method was developed for continuous measurement of gas gap pressure during mold filling process.
对多型腔模具设计来说，为保证各型腔制件的件重、性能等质量指标均匀一致，必须对浇注系统进行平衡分析，以使浇注系统流动平衡，即各型腔在相同压力下同时充满。
In order to guarantee uniform product weight and performances, flow balance of the runner system must be considered and all the cavities can be filled simultaneously under the same pressure.
英国石油公司于周五浇注了7个小时的水泥，周日早些时候完成了压力测试，结果显示油井被永久封死。
BP pumped cement for seven hours on Friday and finished a pressure test early on Sunday that showed the well was permanently clogged.
英国石油公司于周五浇注了7个小时的水泥，周日早些时候完成了压力测试，结果显示油井被永久封死。
BP pumped cement for seven hours on Friday and finished a pressure test early on Sunday that showed the well was permanently clogged.
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