backward-recall signal的意思|示意

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backward-recall信号

Backward d signal 反向d信号
backward acknowledge we are pirates, these data are stolen from youdao signal 后退承认我们是盗版者，这些数据是从有道信号偷来的
backward-transfer signal 反向转移信号
Backward Signal B4 Received 反向信号B4已接收
Register Backward Signal 记发器后向信号
backward slip zone 后滑带
forward-backward slip forward-backward滑
frontward and backward slip 前后滑动
backward bit slip 后钻头滑移
backward somersault with two twists 后空翻两下