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。
The drilling is performed by automated drilling machines with placement controlled by a drill tape or drill file.
该机由自动打孔机和位置控制或磁带演练演练文件。
The drilling is performed by automated drilling machines with placement controlled by a drill tape or drill file.
该机由自动打孔机和位置控制或磁带演练演练文件。
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