自动电话总局：automatic central office 自动电话中心局，自动电话总局：dial central office ..
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An Automatic Call Distributor, usually located in a central office and supplied to the customer by the telephone company with tariffed pricing structures.
自动呼叫分配器，通常位于市话局，由电话公司提供给客户并对定价体系进行征税。
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