客户通常会在数据中心使用交换磁盘或 LUN-level 技术来为计划内和计划外中断提供本地保护，但不涉及到磁盘子系统。
Typically, clients use switched disk or LUN-level switching within a data center to provide local protection from planned and unplanned outages not involving the disk subsystem.
呼叫中心是一个集计算机语音集成技术、程控交换技术、计算机网络技术于一体的综合信息系统。
Call center is a complicated information system, which integrates CTI (Computer Telephony Integration) techniques, Program Controlled Switch technologies, and Network technologies.
经十二指肠途径的超声内镜交换技术进行胆道插管：单中心的累积经验。
Endoscopic ultrasound rendezvous for bile duct access using a transduodenal approach: cumulative experience at a single center.
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