A beam-line vacuum interlock protecting system consists of fast-closing valve, gate valves, sensors and control system.
光束线真空联锁保护系统主要由快阀、门阀、压力传感器(真空规)和控制系统等组成。
2
The window is fastclosing and the urban search and rescue team are going for a final push to find and extract people.
眼见救援之窗即将关闭，城市搜救小组要做最后努力，尽力搜救更多的人。
3
Average living standards in China are still only a sixth and in India a fourteenth of those in America at PPP exchange rates, but the gap is already much smaller than it was and is closingfast.