双电源供电当然是引自两个电源（性质不同），馈电线路当然是两条；一用一备如果指的是电源，那它就是双电源供电。
目前环境下部件最大问题之一是OP 07需要双电源供电。
One of the biggest problems with the part in today's environment is that the OP07 requires dual supplies.
针对不间断供电的需求，介绍了一种以m 68hc 908sr12单片机为主控芯片的双电源转换控制器的研制方案。
To satisfy demand for uninterrupted power supply, the developing scheme of double power switch controller taking M68HC908SR12 controller as main control chip was introduced.
双电源切换系统是一种广泛应用于工矿企业、交通、医院等重要部门以提高供电可靠性的一种装置。
Double power auto switch system is widely applied in factory, government and traffic department, it can enhance power safety.
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