- keholding on
- 保持: keep; hold; retain; maintain ...
- 继续: continue; go on; keep on; pr ...
- 保持继电器: guard relay; hold relay; holding relay; holdingrelay; stick relay; stickrelay
- 自保持继电器: seal-in relay; stick relay
- 磁性保持继电器: magnetic stick relay
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