계측기 자동 제어, 여기서 PR은 무엇을 의미합니까?
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여기서 PR이 무엇을 의미하는지 아는 전문가가 있는지 궁금합니다.
찍은 사진에는 공압 릴레이가 있습니다.
공압 릴레이, 공압 릴레이 가스는 공압 증폭기로 간주될 수 있습니다.
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