The Difference Between Chatzer and Mavoi by Parutz K'Omed
Rabbi Sruly Bornstein
A mavoi needs to be closed, so rubo k'kulo works, 50/50 doesnt Sugya: מחיצה
Rabbi Sruly Bornstein
A mavoi needs to be closed, so rubo k'kulo works, 50/50 doesnt Sugya: מחיצה