safe mass

Probe into Safe Evacuation of Underground Urban Mass Transit Complex

附建式地下轨道交通车站安全疏散探讨

It is an important condition of sign compact in the web for student's job that the CPU card is safe and have the ability of calculate. But mass campus card is RF IC card without the ability of calculate.

具有安全和计算能力的CPU卡是学生就业网签约和认证的重要条件，而大多数校园卡是较低安全机制且无计算能力的射频IC卡。

The substitution of variable crown elevation tailrace tunnel for surge chamber not only can guarantee the safe operation of the powerplant and reduce the investment but also can avoid unfavorable influence of intensively distributed large span underground chambers on the stability of the surrounding rock mass.

用变顶高尾水洞取代调压室，既可保证电站的安全运行和减小工程投资，又避免了大跨度洞室群分布密集给围岩稳定带来的不利影响。

The compressed air is the main safe energy source for mass industrial production.

压缩空气是大规模工业化生产的主要安全能源.

Technology used for CO_2 removal from the closed space requires high efficient, safe and reliable CO_2 extraction systems characterized by small volume, low mass, low rate of energy consumption, minimal use of consumables, and little or no crew time for operation and maintenance.

密闭空气中CO2去除技术首先要求高效、稳定和安全，其次是装置体积小、重量轻、能耗低、寿命长，以及操作和维护简便。