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- vacuum aided distillation 真空蒸馏
- Influence of vacuum aided process on mechanical properties and microstructure of castings by two kinds of gating systems(fan shaped single runner and branch runner)was discussed. 讨论真空辅助工艺对两种浇道系统(扇形单浇道和分支浇道)铸件的力学性能和微观结构的影响;
- Principle of vacuum aid grouting technology is based on common grouting process,using vacuum pump to absorb air in tiny cavity,forming 0. 真空辅助压浆工艺的原理是在普通压浆工艺基础上,采用真空泵排除孔内空气,使孔道内形成负压0。
- It means to give the most-needed and timely aid. 它的意思是给予最需要的及时的帮助。
- Some pumps and all vacuum cleaners work by suction. 有些泵和所有真空吸尘器都是借吸力工作的。
- We may purge water by distillation. 我们可以用蒸馏法使水净化。
- A liquid condensed from vapor in distillation. 蒸馏液; 馏出物在蒸馏中，从蒸汽浓缩的液体
- His wife's death left him a vacuum in his life. 他妻子的去世使他的生活变得空虚。
- Her husband's death left a vacuum in her life. 她丈夫的死使她的生活变得空虚。
- Some people are living in a vacuum. 有些人过着与世隔绝的生活。
- A vacuum cleaner is a handy household tool. 吸尘器是一种使用方便的家庭用具。
- I'm collecting money in aid of starving children. 为帮助饥饿的孩子们，我正在搞募捐。
- The shop repairs vacuum cleaners. 这家店修理吸尘器。
- The porter turned off the vacuum. 清洁工关掉真空吸尘器。
- Inflammable ether was not used and vacuum distillation was omitted. 不使用易燃性乙醚作溶剂,省略高真空蒸馏。
- She used slides as a teaching aid. 她用幻灯片作教学工具。
- They offer financial aid with no strings attached. 他们无条件提供财务援助。
- My friends bailed me out with economic aid. 我的朋友们从经济上帮助我使我脱离困境。
- Every paragraph is a distillation of sound judgment. 每段话都是正确判断的结晶。
- The symbol for the speed of light in a vacuum. 表示真空中光速的物理符号
