Several distributor transformers had fallen from the poles, and secondary wires and service drops were down.几个配电变压器从电线杆上摔下来, 副线及吊饰也垂下来.The magnetic cores of transformers and other apparatus are laminated.把变压器及其它仪器的磁心分层.A...
The magnetic cores of transformers and other apparatus are laminated.把变压器及其它仪器的磁心分层.Several distributor transformers had fallen from the poles, and secondary wires and service drops were down.几个配电变压器从电线杆上摔下来, 副线及吊饰也垂下来.R...