전기 자지 추정 - 전립선이 대부분의 전자를 얻을 때 정액이 흐른다

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Most of video: tri-phase -- CH A+ is head and A- is base / CH B+ is anal probe and B- is base. Last part of video: CH A+ is glans loop and A- is anal / CH B+ is frenulum and B- is anal (prostate)

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