ABB自动双电源转换开关 OTM50F3C21D380C;10230141

##ABB一级代理、双电源转换开关/控制器OTM50F3C21D380C 10230141

ABB OTM_C21D 双电源自动转换开关OTM50F2C/3C/4CB21D220C/380C