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顺序控制单元SCU

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The sequence control unit is a mechanical key issuing/control device. It is normally placed locally to the valve system. It differs from a key exchange unit in that, upon inserting a permit key, a selector knob is rotated to a fixed position before the next key is issued.

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顺序控制单元SCU是一个机械化钥匙释放与控制的装置。它通常放置于阀门系统中。它与钥匙交换单元的区别在于,插入授权钥匙后,才能将选择旋钮旋转到固定的位置,然后才能释放下一把钥匙。

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