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| 유사 시 대기 운영자 (A user who receives the alert if the designated operator cannot be reached) | |||
| English thesaurus | |||
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| failsafe operator (ssn) | |||
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| |||
| 유사 시 대기 운영자 (A user who receives the alert if the designated operator cannot be reached) | |||
| English thesaurus | |||
| |||
| failsafe operator (ssn) | |||