... relay assembly 继电器组合,继电器组件 relay back up 继电器后备保护[装置] relay backstop 继电器止档 ...
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relay back-up 继电器后备保护
relay back up
中继备份
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Back then many companies ran a free, open-source e-mail relay technology but ended up spending more than they thought they would making the stuff work.
FORBES: You Get What You Pay For
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