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1)  dehydration with decompressing
减压脱水
1.
4-cyan-o-phthalic anhydride is synthesized from 4-chloroformylphthalic anhydride by aminating then dehydration with decompressing,its boiling point is 175~180°C/0.
Ⅱ经过胺化、减压脱水制得 4 -氰基苯甲酸酐 ,其沸点为 175~ 180 C/ 0 2 6KPa ,各反应物摩尔比为n (Ⅱ ) :n (NH3 ) :n (P2 O5) =1 0 :4 7:2 1。
2)  de-bubbling through pressure reduction
减压脱泡
1.
By adopting de-bubbling through pressure reduction,glass quality can be improved after eliminating bubble,and at the same time melting temperature can be decreased by 150 ℃,1 300 ℃ for the lowest.
减压脱泡技术是一项玻璃熔制工艺中出现的新技术,已经引起玻璃行业的高度重视。
3)  submarine decompression escape
减压脱险
4)  decompression desaturation
减压脱饱和
5)  pressure-lowering by pumping water
抽水减压
6)  reducing pressure water supply
减压给水
1.
Based upon comparison of various water supply ways in domestic water supply system of high-rise building in this paper according to practical situations author points out the reducing pressure water supply of elevated water tank or mixed method are more economical and reasonable ways for high-rise building.
通过高层建筑生活给水系统各种给水方式的分析比较 ,指出根据具体情况采用高位水箱减压给水方式或几种给水方式的结合在目前是比较经济合理的给水方式。
补充资料:常减压蒸馏装置
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性质:常减压蒸馏装置通常包括三部分:(1)原油预处理。采用加入化学物质和高压电场联合作用下的电化学法除去原油中混杂的水和盐类。(2)常压蒸馏。原油在加热炉内被加热至370℃左右,送入常压蒸馏塔在常压(1大气压)下蒸馏出沸点较低的汽油和柴油馏分,残油是常压重油。(3)减压蒸馏。常压重油再经加热炉被加热至410℃左右,进入减压蒸馏塔在约8.799千帕(60毫米汞柱)绝压下蒸馏,馏出裂化原料的润滑油原料,残油为减压渣油。参见原油蒸馏。

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