电机短路测试仪
electric motor short circuit test instrument
双回线短线路
short double-circuit transmission line
线对线短路试验
line-to-line short circuit tests
流量表显示装置线路板校验
flow meter readout circuit board check
流量显示装置线路板
flow readout circuit board
flow readout box circuit board
三接线端的电磁线圈线路
three terminal solenoid circuit