customer switching system
用户交换系统 customer switching system 远地用户交换 rss remote subscriber switch ..
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customer switching system
客户转换系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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But it is notoriously ill-suited to high-tech industries that have to tailor each item to a customer's specific needs (as in a data-switching centre or air-traffic-control system) or in which it is crucial that thousands of interrelated components all work correctly together (as in a rocket vehicle).
ECONOMIST: The land of disappointments