A new kind of practical Pulse conversion transponder has been developed, which based on 555 timing IC.

研制了一种实用新型的脉冲变送器，主要电路部件为555集成定时器。

youdao

A new kind of practical Pulse conversion transponder has been developed, which based on 555 timing IC.

研制了一种实用新型的脉冲变送器，主要电路部件为555集成定时器。

youdao