| 摘要 |
An interface means for interconnecting a sequentially actuated apparatus and a computer to automatically maintain at a desired level a process variable of said apparatus. The interface means comprises first, second, and third actuation means adapted for actuating the apparatus or computer in accordance with one of the three output signals from the computer to achieve said desired level. A system is also described which automatically maintains a process variable of a sequentially actuated apparatus at a desired level.
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