首先有一个主冷却系统，然后有一个备用系统，备用系统还有一个备用系统，再有一个备用系统的备用系统，如此下去。
There's the main cooling system, a backup to it, a backup to the backup, a backup to the backup to the backup, and so on.
我们谈论的是，一个反应堆出现了破裂，在主系统的冷却系统，还有两端，闸床的破裂是什么？
So we're talking about a reactor that has a break in the primary cooling system and what is a double ended guillotine break?
在产生高于平均热量的区域需装上通风和现场冷却系统，如在主洗衣房、客人洗衣房、干洗区、面包房和员工厨房等区域。
Ventilation andspot cooling systems will carefully planned in areas that generate aboveaverage heat, such as Major Laundry, Guest Laundry and Dry Cleaning, Bakeriesand Employee cooking areas.
针对反应堆的特殊要求，主氦循环风机的设计包括总体结构、叶轮型式、冷却系统、轴承、测量仪表、电气贯穿件和隔断阀。
The design of the helium circulator involves the overall construction, the impeller type, the cooling system, the bearings, the instrumentation, the electrical penetrations, and the shutoff valve.
主回路冷却系统的窄间隙焊接及其应用。
Narrow gap welding and its applications in primary cooling systems.
地震发生时，核电站已经自动中止裂变反应过程，一般只剩下冷却系统——主发电机和备用发电机——仍处于运行状态。
At the onset of the earthquake, the plant automatically shut down the fission process, which normally would leave the coolant system — both the main one and a backup generator — still operational.
主机部分：由机架、主电机、减速机、螺杆炮筒副加料系统、电热系统、冷却系统等组成。
The main parts: the rack, the main motor, the speed reducer, the screw cylinder rewind materials system, heating system, cooling system, etc.
主机部分：由机架、主电机、减速机、螺杆炮筒副加料系统、电热系统、冷却系统等组成。
The main parts: the rack, the main motor, the speed reducer, the screw cylinder rewind materials system, heating system, cooling system, etc.
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