English translation for "free line signal"

空闲线信号
空线信号

Similar Words：

"free limb" English translation, "free limb movement" English translation, "free lime" English translation, "free line" English translation, "free line condition" English translation, "free line trunk" English translation, "free linear light" English translation, "free link" English translation, "free linkage" English translation, "free liquid" English translation