pressure switch continuity test
armature continuity test
brush assembly continuity test
continuity test
连续性试验
断续探查
通路测式
通路试验
通路测试
导通测试
断线探查
directional control switch continuity check
field winding continuity test
rotor field winding continuity test
shunt coil continuity test
stator winding continuity test
control panel lamp test switch
ems fault light test switch