forward-backward slip的意思|示意

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forward-backward滑

backward slip zone 后滑带
backward-recall signal 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
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
pike backward somersault 派克后空翻
Bicycle backward somersault 自行车后空翻