2B3UM,断路器 3A MCB B CHAR 277VAC UL508
2B3UR,断路器 3A,MCB B CHAR 2PL 480Y/277VAC, UL1077
2B4,2 BLACK MNTING BARRIER ATTACH
2B40UM,断路器 40A MCB B CHAR 1P+N 277VAC UL508
2B40UR,断路器 40A,MCB B CHAR 2PL 480Y/277VAC, UL1077
2B4-12E,GROMMET 4-TYPE FR
2B48,开关硬件 SHORT MNTING BARRIER GREEN TYPE 1
【3M】2B4A-505-ISG,COVER 2-TYPE FR 505 ISG
