AppleTalk回音协定
AppleTalk - echo protocol
变速箱回油
transmission scavenge oil
变速箱回油泵
transmission scavenge pump
变速箱回油泵部分
transmission scavenge pump section
变速箱回油部分
transmission scavenge section
变速箱回油管路滤网盖
transmission scavenge line screen cover
测回音控制装置指示元
half echo control deveice indicator
大容量回音抵消器
HCEC High Capacity Echo Canceller
电话回音消除
telephone echo cancellation