An economical technique is presented of conventional tape recording and replay for ultra-low frequency signal.

介绍一种经济实用的用普通磁带记录与回放超低频信号的方法。

youdao

An economical technique is presented of conventional tape recording and replay for ultra-low frequency signal.

介绍一种经济实用的用普通磁带记录与回放超低频信号的方法。

youdao