不常用备件 rarely used spare parts
常用装备 common equipment
经常使用装备 common equipment
常用仪器设备名称 Unit l Common Instruments
常用的设备驱动 drivers
常用电信设备名词术语 General terminology for telecommunications equipment
经常备用的货币 active money
经常使用设备 common equipment
家里备常用药 Common Drugs
备用常用程序 Canned routine program
常用备
Commonly used equipment
以上为机器翻译结果，长、整句建议使用 人工翻译 。
针对铁路信号中常用的双机热备结构进行了可靠性和安全性分析。
This paper analyzes the reliability and safety of dual module hot spare architecture which is widely used in railway signalling system to achieve high reliability and safety.
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