But now, there are a lot of old-tape lathes are controlled by relays .

而目前在我国仍有相当数量的机床采用继电器控制。

youdao

But now, there are a lot of old-tape lathes are controlled by relays .

而目前在我国仍有相当数量的机床采用继电器控制。

youdao