Color-changing nonel tube, nitrogen, oxygen and vac uum system were used to study influence of gaseous medium inside nonel tube on i ts detonation propagation reliability.
利用变色塑料导爆管、氮气、氧气和真空系统对管腔内介质影响导爆管传爆可靠性做了研究。
In a moden company, UUM system has been becoming more and more important.
当今的企业越来越有必要建立一个统一的IT用户管理系统。
For a long time, motor drive and control has to use electrical equipments and electrical vac - uum devices, has many disadvantages of large volume, heavy weight, high lost, low reliability on operation and more complex repairing, saving, transport.
长期以来，电动机驱动与控制所用电器和电真空器件，具有体积大、重量重、功耗大、运行可靠性差、维修储存运输较复杂等缺点。
- and (2) the solutions are Conformally related to a particular vac-uum solution admitting a three-dimensional group of motion of of Bianchi type VI_0 on a timelike hypersurface.
与在类时超曲面上具有三维运动群的BianchiVI0型真空解共形。
Do you know that 2 years ago in UUM, a Chinese contester was being threatened and harassed by some unknown calls until he was forced to withdraw from the election eventually?
你是否知道，两年前在北方大学，一名华裔候选人遭不知名者致电威胁与骚扰，直到最后他被逼退出竞选？
In a moden company, UUM (Unified Users Management) system has been becoming more and more important.
当今的企业越来越有必要建立一个统一的IT用户（主要是本企业员工）管理系统。