신규 합성암모니아 설비 숙련공 교육생 비율은 얼마가 적절한가?
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신규 합성암모니아 설비 숙련공 교육생 비율은 얼마가 적절한가?규정 같은 게 있나요?
모두가 각자 차를 운전할 때, 숙련된 운전자와 초보 운전자의 비율에 대해 논의해 보는 것은 어떨까요!
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