A logic element designed to act as either an adder or a subtracter in accordance with the control signal applied to it.
根据供给它的控制信号，或起加法器作用或起减法器作用的一种逻辑元件。
A logic element designed to act as either an adder or a subtracter in accordance with the control signal applied to it.
根据供给它的控制信号，或起加法器作用或起减法器作用的一种逻辑元件。
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