negative pressure systems 中文意思是什麼
negative pressure systems
解釋
負壓系統-
Through studying it is shown that in chagan sag, the geothermal gradients in the center are higher than those around the sag margin and major factors influencing the characteristics of temperature field distribution are the property of geotectogenesis and the differences in tectonic portion, lithology and underground water behaviour ; there are three types of mudstone compaction, i. e. normal compaction, undercompacition and overcomepaction ; there are two pressure systems in sandstone reservoirs, i. e. normal pressure and negative pressure systems and the strata ' s being uplifted and denuded is the key factor leading to the formation of the negative pressure system in reservoir ; and the distinctive temperature - pressure field characteristics in the sag are possessed of important petroleum geological significance in hydrocarbon source maturity, hydrocarbon generation, widening on oil and gas exploration domain and selecting exploration targets, etc
研究表明，查干凹陷中心的地溫梯度高於凹陷邊緣，大地構造性質及所處構造部位、巖性與地下水活動的差異是影響凹陷地溫場分佈特徵的主要因素；泥巖壓實存在正常壓實、欠壓實和過壓實三種類型，砂巖儲層段壓力類型可分為正常和負壓兩個系統，地層抬升剝蝕是導致儲層負壓系統形成的主導因素；凹陷獨特的溫壓場特徵對烴源巖成熟、油氣生成、油氣勘探領域的擴大及勘探方向的選擇等具有重要的油氣地質意義。 -
Modifying the hvac systems in hospitals to maintain negative pressure and optimise fresh air intake in sars wards and selected operating theatres
改裝各醫院的空調系統，以維持負氣壓，並盡量增加沙士病房及某些手術室的新鮮空氣供應； -
Two crucial technologies in instantaneous negative pressure wave method are analyzed in this dissertation, then a means is presented which can eliminate the dynamic response time diversity between pressure sensors in the beginning and end of the pipeline, by adopting gps to unify the system time between data collecting systems in two ends
分析了負壓波泄漏定位方法的兩項關鍵技術，提出了消除首末、端壓力傳感器動態響應時間差的方法，採用gps來統一首末端數據採集系統的系統時間；使定位更加準確。 -
Plastics piping systems - elastomeric - sealing - ring - type socket joints of unplasticized poly vinyl chloride for use with pvc - u pipes - test method for leaktightness under negative pressure
塑料管道系統.與未增塑聚氯乙烯管一起使用的未增塑聚氯乙烯彈性密封環式套筒接頭.負壓下的密封性試驗方法
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