Duchkah D'sakinah [Part 2] (Bitul and Blios #21 - Shulchan Aruch 96:1-3)
Rabbi Dovid Cohen
Duchkah D'sakinah [Part 2]: Fish in a non-kosher fish store; Cut fruit and vegetables; Grinding and chewing; Plate underneath; Scraping; Knife sharpening; Multiple steps; Six hours. See seforim by Rabbi Cohen at www.kashrushalacha.com