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保持
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in specified order only
Chinese
English
保持
开放
hold clear
保持
自保,吸持
电路
hold circuit
保持
继电器
retaining
retained
relay
同步
保持
时间
synchronization holding time
HOLD 呼叫
保持
HOLD call
呼叫
保持
call holding
跟踪
保持
电路
track and hold circuit
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